20984625

素因数分解:

$3^2\times 5^3\times {\mathrm{23}}^1\times {\mathrm{811}}^1$

素因数の和:855

約数の個数: 48

約数和(自身を含む): 39521664

約数和(自身を除く): 18537039

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 125, 207, 225, 345, 375, 575, 811, 1035, 1125, 1725, 2433, 2875, 4055, 5175, 7299, 8625, 12165, 18653, 20275, 25875, 36495, 55959, 60825, 93265, 101375, 167877, 182475, 279795, 304125, 466325, 839385, 912375, 1398975, 2331625, 4196925, 6994875, 20984625]

約数ペア:

[(1, 20984625), (3, 6994875), (5, 4196925), (9, 2331625), (15, 1398975), (23, 912375), (25, 839385), (45, 466325), (69, 304125), (75, 279795), (115, 182475), (125, 167877), (207, 101375), (225, 93265), (345, 60825), (375, 55959), (575, 36495), (811, 25875), (1035, 20275), (1125, 18653), (1725, 12165), (2433, 8625), (2875, 7299), (4055, 5175)]