20164375

素因数分解:

$5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{419}}^1$

素因数の和:457

約数の個数: 40

約数和(自身を含む): 31489920

約数和(自身を除く): 11325545

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 125, 175, 275, 385, 419, 625, 875, 1375, 1925, 2095, 2933, 4375, 4609, 6875, 9625, 10475, 14665, 23045, 32263, 48125, 52375, 73325, 115225, 161315, 261875, 366625, 576125, 806575, 1833125, 2880625, 4032875, 20164375]

約数ペア:

[(1, 20164375), (5, 4032875), (7, 2880625), (11, 1833125), (25, 806575), (35, 576125), (55, 366625), (77, 261875), (125, 161315), (175, 115225), (275, 73325), (385, 52375), (419, 48125), (625, 32263), (875, 23045), (1375, 14665), (1925, 10475), (2095, 9625), (2933, 6875), (4375, 4609)]