21575625

素因数分解:

$3^1\times 5^4\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:371

約数の個数: 40

約数和(自身を含む): 37038144

約数和(自身を除く): 15462519

約数列:

[1, 3, 5, 15, 25, 37, 75, 111, 125, 185, 311, 375, 555, 625, 925, 933, 1555, 1875, 2775, 4625, 4665, 7775, 11507, 13875, 23125, 23325, 34521, 38875, 57535, 69375, 116625, 172605, 194375, 287675, 583125, 863025, 1438375, 4315125, 7191875, 21575625]

約数ペア:

[(1, 21575625), (3, 7191875), (5, 4315125), (15, 1438375), (25, 863025), (37, 583125), (75, 287675), (111, 194375), (125, 172605), (185, 116625), (311, 69375), (375, 57535), (555, 38875), (625, 34521), (925, 23325), (933, 23125), (1555, 13875), (1875, 11507), (2775, 7775), (4625, 4665)]