21650710

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{331}}^1$

素因数の和:580

約数の個数: 32

約数和(自身を含む): 40541184

約数和(自身を除く): 18890474

約数列:

[1, 2, 5, 10, 31, 62, 155, 211, 310, 331, 422, 662, 1055, 1655, 2110, 3310, 6541, 10261, 13082, 20522, 32705, 51305, 65410, 69841, 102610, 139682, 349205, 698410, 2165071, 4330142, 10825355, 21650710]

約数ペア:

[(1, 21650710), (2, 10825355), (5, 4330142), (10, 2165071), (31, 698410), (62, 349205), (155, 139682), (211, 102610), (310, 69841), (331, 65410), (422, 51305), (662, 32705), (1055, 20522), (1655, 13082), (2110, 10261), (3310, 6541)]