2161940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{317}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 5128704

約数和(自身を除く): 2966764

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 155, 220, 310, 317, 341, 620, 634, 682, 1268, 1364, 1585, 1705, 3170, 3410, 3487, 6340, 6820, 6974, 9827, 13948, 17435, 19654, 34870, 39308, 49135, 69740, 98270, 108097, 196540, 216194, 432388, 540485, 1080970, 2161940]

約数ペア:

[(1, 2161940), (2, 1080970), (4, 540485), (5, 432388), (10, 216194), (11, 196540), (20, 108097), (22, 98270), (31, 69740), (44, 49135), (55, 39308), (62, 34870), (110, 19654), (124, 17435), (155, 13948), (220, 9827), (310, 6974), (317, 6820), (341, 6340), (620, 3487), (634, 3410), (682, 3170), (1268, 1705), (1364, 1585)]