20908875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4289}}^1$

素因数の和:4320

約数の個数: 32

約数和(自身を含む): 37477440

約数和(自身を除く): 16568565

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4289, 4875, 12867, 21445, 55757, 64335, 107225, 167271, 278785, 321675, 536125, 836355, 1393925, 1608375, 4181775, 6969625, 20908875]

約数ペア:

[(1, 20908875), (3, 6969625), (5, 4181775), (13, 1608375), (15, 1393925), (25, 836355), (39, 536125), (65, 321675), (75, 278785), (125, 167271), (195, 107225), (325, 64335), (375, 55757), (975, 21445), (1625, 12867), (4289, 4875)]