21804625

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:394

約数の個数: 32

約数和(自身を含む): 29832192

約数和(自身を除く): 8027567

約数列:

[1, 5, 17, 25, 31, 85, 125, 155, 331, 425, 527, 775, 1655, 2125, 2635, 3875, 5627, 8275, 10261, 13175, 28135, 41375, 51305, 65875, 140675, 174437, 256525, 703375, 872185, 1282625, 4360925, 21804625]

約数ペア:

[(1, 21804625), (5, 4360925), (17, 1282625), (25, 872185), (31, 703375), (85, 256525), (125, 174437), (155, 140675), (331, 65875), (425, 51305), (527, 41375), (775, 28135), (1655, 13175), (2125, 10261), (2635, 8275), (3875, 5627)]