18109960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:622

約数の個数: 64

約数和(自身を含む): 45100800

約数和(自身を除く): 26990840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 521, 632, 790, 869, 1042, 1580, 1738, 2084, 2605, 3160, 3476, 4168, 4345, 5210, 5731, 6952, 8690, 10420, 11462, 17380, 20840, 22924, 28655, 34760, 41159, 45848, 57310, 82318, 114620, 164636, 205795, 229240, 329272, 411590, 452749, 823180, 905498, 1646360, 1810996, 2263745, 3621992, 4527490, 9054980, 18109960]

約数ペア:

[(1, 18109960), (2, 9054980), (4, 4527490), (5, 3621992), (8, 2263745), (10, 1810996), (11, 1646360), (20, 905498), (22, 823180), (40, 452749), (44, 411590), (55, 329272), (79, 229240), (88, 205795), (110, 164636), (158, 114620), (220, 82318), (316, 57310), (395, 45848), (440, 41159), (521, 34760), (632, 28655), (790, 22924), (869, 20840), (1042, 17380), (1580, 11462), (1738, 10420), (2084, 8690), (2605, 6952), (3160, 5731), (3476, 5210), (4168, 4345)]