2177780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 5261760

約数和(自身を除く): 3083980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 521, 836, 1042, 1045, 2084, 2090, 2605, 4180, 5210, 5731, 9899, 10420, 11462, 19798, 22924, 28655, 39596, 49495, 57310, 98990, 108889, 114620, 197980, 217778, 435556, 544445, 1088890, 2177780]

約数ペア:

[(1, 2177780), (2, 1088890), (4, 544445), (5, 435556), (10, 217778), (11, 197980), (19, 114620), (20, 108889), (22, 98990), (38, 57310), (44, 49495), (55, 39596), (76, 28655), (95, 22924), (110, 19798), (190, 11462), (209, 10420), (220, 9899), (380, 5731), (418, 5210), (521, 4180), (836, 2605), (1042, 2090), (1045, 2084)]