19708780

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{13}}^2\times {\mathrm{17}}^1$

素因数の和:73

約数の個数: 144

約数和(自身を含む): 55339200

約数和(自身を除く): 35630420

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 17, 20, 26, 28, 34, 35, 49, 52, 65, 68, 70, 85, 91, 98, 119, 130, 140, 169, 170, 182, 196, 221, 238, 245, 260, 338, 340, 343, 364, 442, 455, 476, 490, 595, 637, 676, 686, 833, 845, 884, 910, 980, 1105, 1183, 1190, 1274, 1372, 1547, 1666, 1690, 1715, 1820, 2210, 2366, 2380, 2548, 2873, 3094, 3185, 3332, 3380, 3430, 4165, 4420, 4459, 4732, 5746, 5831, 5915, 6188, 6370, 6860, 7735, 8281, 8330, 8918, 10829, 11492, 11662, 11830, 12740, 14365, 15470, 16562, 16660, 17836, 20111, 21658, 22295, 23324, 23660, 28730, 29155, 30940, 33124, 40222, 41405, 43316, 44590, 54145, 57460, 57967, 58310, 75803, 80444, 82810, 89180, 100555, 108290, 115934, 116620, 140777, 151606, 165620, 201110, 216580, 231868, 281554, 289835, 303212, 379015, 402220, 563108, 579670, 703885, 758030, 985439, 1159340, 1407770, 1516060, 1970878, 2815540, 3941756, 4927195, 9854390, 19708780]

約数ペア:

[(1, 19708780), (2, 9854390), (4, 4927195), (5, 3941756), (7, 2815540), (10, 1970878), (13, 1516060), (14, 1407770), (17, 1159340), (20, 985439), (26, 758030), (28, 703885), (34, 579670), (35, 563108), (49, 402220), (52, 379015), (65, 303212), (68, 289835), (70, 281554), (85, 231868), (91, 216580), (98, 201110), (119, 165620), (130, 151606), (140, 140777), (169, 116620), (170, 115934), (182, 108290), (196, 100555), (221, 89180), (238, 82810), (245, 80444), (260, 75803), (338, 58310), (340, 57967), (343, 57460), (364, 54145), (442, 44590), (455, 43316), (476, 41405), (490, 40222), (595, 33124), (637, 30940), (676, 29155), (686, 28730), (833, 23660), (845, 23324), (884, 22295), (910, 21658), (980, 20111), (1105, 17836), (1183, 16660), (1190, 16562), (1274, 15470), (1372, 14365), (1547, 12740), (1666, 11830), (1690, 11662), (1715, 11492), (1820, 10829), (2210, 8918), (2366, 8330), (2380, 8281), (2548, 7735), (2873, 6860), (3094, 6370), (3185, 6188), (3332, 5915), (3380, 5831), (3430, 5746), (4165, 4732), (4420, 4459)]