217823980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^2$

素因数の和:152

約数の個数: 144

約数和(自身を含む): 555770880

約数和(自身を除く): 337946900

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 31, 38, 41, 44, 55, 62, 76, 82, 95, 110, 124, 155, 164, 190, 205, 209, 220, 310, 341, 380, 410, 418, 451, 589, 620, 682, 779, 820, 836, 902, 1045, 1178, 1271, 1364, 1558, 1681, 1705, 1804, 2090, 2255, 2356, 2542, 2945, 3116, 3362, 3410, 3895, 4180, 4510, 5084, 5890, 6355, 6479, 6724, 6820, 7790, 8405, 8569, 9020, 11780, 12710, 12958, 13981, 15580, 16810, 17138, 18491, 24149, 25420, 25916, 27962, 31939, 32395, 33620, 34276, 36982, 42845, 48298, 52111, 55924, 63878, 64790, 69905, 73964, 85690, 92455, 96596, 104222, 120745, 127756, 129580, 139810, 159695, 171380, 184910, 208444, 241490, 260555, 265639, 279620, 319390, 351329, 369820, 482980, 521110, 531278, 573221, 638780, 702658, 990109, 1042220, 1062556, 1146442, 1328195, 1405316, 1756645, 1980218, 2292884, 2656390, 2866105, 3513290, 3960436, 4950545, 5312780, 5732210, 7026580, 9901090, 10891199, 11464420, 19802180, 21782398, 43564796, 54455995, 108911990, 217823980]

約数ペア:

[(1, 217823980), (2, 108911990), (4, 54455995), (5, 43564796), (10, 21782398), (11, 19802180), (19, 11464420), (20, 10891199), (22, 9901090), (31, 7026580), (38, 5732210), (41, 5312780), (44, 4950545), (55, 3960436), (62, 3513290), (76, 2866105), (82, 2656390), (95, 2292884), (110, 1980218), (124, 1756645), (155, 1405316), (164, 1328195), (190, 1146442), (205, 1062556), (209, 1042220), (220, 990109), (310, 702658), (341, 638780), (380, 573221), (410, 531278), (418, 521110), (451, 482980), (589, 369820), (620, 351329), (682, 319390), (779, 279620), (820, 265639), (836, 260555), (902, 241490), (1045, 208444), (1178, 184910), (1271, 171380), (1364, 159695), (1558, 139810), (1681, 129580), (1705, 127756), (1804, 120745), (2090, 104222), (2255, 96596), (2356, 92455), (2542, 85690), (2945, 73964), (3116, 69905), (3362, 64790), (3410, 63878), (3895, 55924), (4180, 52111), (4510, 48298), (5084, 42845), (5890, 36982), (6355, 34276), (6479, 33620), (6724, 32395), (6820, 31939), (7790, 27962), (8405, 25916), (8569, 25420), (9020, 24149), (11780, 18491), (12710, 17138), (12958, 16810), (13981, 15580)]