1997211580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{389}}^1$

素因数の和:469

約数の個数: 216

約数和(自身を含む): 5467512960

約数和(自身を除く): 3470301380

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 49, 52, 62, 65, 70, 91, 98, 124, 130, 140, 155, 169, 182, 196, 217, 245, 260, 310, 338, 364, 389, 403, 434, 455, 490, 620, 637, 676, 778, 806, 845, 868, 910, 980, 1085, 1183, 1274, 1519, 1556, 1612, 1690, 1820, 1945, 2015, 2170, 2366, 2548, 2723, 2821, 3038, 3185, 3380, 3890, 4030, 4340, 4732, 5057, 5239, 5446, 5642, 5915, 6076, 6370, 7595, 7780, 8060, 8281, 10114, 10478, 10892, 11284, 11830, 12059, 12740, 13615, 14105, 15190, 16562, 19061, 19747, 20228, 20956, 23660, 24118, 25285, 26195, 27230, 28210, 30380, 33124, 35399, 36673, 38122, 39494, 41405, 48236, 50570, 52390, 54460, 56420, 60295, 65741, 70798, 73346, 76244, 78988, 82810, 84413, 95305, 98735, 101140, 104780, 120590, 131482, 141596, 146692, 156767, 165620, 168826, 176995, 183365, 190610, 197470, 241180, 247793, 256711, 262964, 313534, 328705, 337652, 353990, 366730, 381220, 394940, 422065, 460187, 495586, 513422, 590891, 627068, 657410, 707980, 733460, 783835, 844130, 920374, 991172, 1026844, 1097369, 1181782, 1238965, 1283555, 1314820, 1567670, 1688260, 1840748, 2037971, 2194738, 2300935, 2363564, 2477930, 2567110, 2954455, 3135340, 3221309, 4075942, 4389476, 4601870, 4955860, 5134220, 5486845, 5908910, 6442618, 7681583, 8151884, 9203740, 10189855, 10973690, 11817820, 12885236, 14265797, 15363166, 16106545, 20379710, 21947380, 28531594, 30726332, 32213090, 38407915, 40759420, 57063188, 64426180, 71328985, 76815830, 99860579, 142657970, 153631660, 199721158, 285315940, 399442316, 499302895, 998605790, 1997211580]

約数ペア:

[(1, 1997211580), (2, 998605790), (4, 499302895), (5, 399442316), (7, 285315940), (10, 199721158), (13, 153631660), (14, 142657970), (20, 99860579), (26, 76815830), (28, 71328985), (31, 64426180), (35, 57063188), (49, 40759420), (52, 38407915), (62, 32213090), (65, 30726332), (70, 28531594), (91, 21947380), (98, 20379710), (124, 16106545), (130, 15363166), (140, 14265797), (155, 12885236), (169, 11817820), (182, 10973690), (196, 10189855), (217, 9203740), (245, 8151884), (260, 7681583), (310, 6442618), (338, 5908910), (364, 5486845), (389, 5134220), (403, 4955860), (434, 4601870), (455, 4389476), (490, 4075942), (620, 3221309), (637, 3135340), (676, 2954455), (778, 2567110), (806, 2477930), (845, 2363564), (868, 2300935), (910, 2194738), (980, 2037971), (1085, 1840748), (1183, 1688260), (1274, 1567670), (1519, 1314820), (1556, 1283555), (1612, 1238965), (1690, 1181782), (1820, 1097369), (1945, 1026844), (2015, 991172), (2170, 920374), (2366, 844130), (2548, 783835), (2723, 733460), (2821, 707980), (3038, 657410), (3185, 627068), (3380, 590891), (3890, 513422), (4030, 495586), (4340, 460187), (4732, 422065), (5057, 394940), (5239, 381220), (5446, 366730), (5642, 353990), (5915, 337652), (6076, 328705), (6370, 313534), (7595, 262964), (7780, 256711), (8060, 247793), (8281, 241180), (10114, 197470), (10478, 190610), (10892, 183365), (11284, 176995), (11830, 168826), (12059, 165620), (12740, 156767), (13615, 146692), (14105, 141596), (15190, 131482), (16562, 120590), (19061, 104780), (19747, 101140), (20228, 98735), (20956, 95305), (23660, 84413), (24118, 82810), (25285, 78988), (26195, 76244), (27230, 73346), (28210, 70798), (30380, 65741), (33124, 60295), (35399, 56420), (36673, 54460), (38122, 52390), (39494, 50570), (41405, 48236)]