21815625

素因数分解:

$3^1\times 5^5\times {\mathrm{13}}^1\times {\mathrm{179}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 39372480

約数和(自身を除く): 17556855

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 179, 195, 325, 375, 537, 625, 895, 975, 1625, 1875, 2327, 2685, 3125, 4475, 4875, 6981, 8125, 9375, 11635, 13425, 22375, 24375, 34905, 40625, 58175, 67125, 111875, 121875, 174525, 290875, 335625, 559375, 872625, 1454375, 1678125, 4363125, 7271875, 21815625]

約数ペア:

[(1, 21815625), (3, 7271875), (5, 4363125), (13, 1678125), (15, 1454375), (25, 872625), (39, 559375), (65, 335625), (75, 290875), (125, 174525), (179, 121875), (195, 111875), (325, 67125), (375, 58175), (537, 40625), (625, 34905), (895, 24375), (975, 22375), (1625, 13425), (1875, 11635), (2327, 9375), (2685, 8125), (3125, 6981), (4475, 4875)]