215481640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{211}}^2$

素因数の和:455

約数の個数: 72

約数和(自身を含む): 535454010

約数和(自身を除く): 319972370

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 211, 220, 242, 422, 440, 484, 605, 844, 968, 1055, 1210, 1688, 2110, 2321, 2420, 4220, 4642, 4840, 8440, 9284, 11605, 18568, 23210, 25531, 44521, 46420, 51062, 89042, 92840, 102124, 127655, 178084, 204248, 222605, 255310, 356168, 445210, 489731, 510620, 890420, 979462, 1021240, 1780840, 1958924, 2448655, 3917848, 4897310, 5387041, 9794620, 10774082, 19589240, 21548164, 26935205, 43096328, 53870410, 107740820, 215481640]

約数ペア:

[(1, 215481640), (2, 107740820), (4, 53870410), (5, 43096328), (8, 26935205), (10, 21548164), (11, 19589240), (20, 10774082), (22, 9794620), (40, 5387041), (44, 4897310), (55, 3917848), (88, 2448655), (110, 1958924), (121, 1780840), (211, 1021240), (220, 979462), (242, 890420), (422, 510620), (440, 489731), (484, 445210), (605, 356168), (844, 255310), (968, 222605), (1055, 204248), (1210, 178084), (1688, 127655), (2110, 102124), (2321, 92840), (2420, 89042), (4220, 51062), (4642, 46420), (4840, 44521), (8440, 25531), (9284, 23210), (11605, 18568)]