20129375

素因数分解:

$5^4\times 7^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:177

約数の個数: 40

約数和(自身を含む): 29690496

約数和(自身を除く): 9561121

約数列:

[1, 5, 7, 25, 35, 43, 107, 125, 175, 215, 301, 535, 625, 749, 875, 1075, 1505, 2675, 3745, 4375, 4601, 5375, 7525, 13375, 18725, 23005, 26875, 32207, 37625, 66875, 93625, 115025, 161035, 188125, 468125, 575125, 805175, 2875625, 4025875, 20129375]

約数ペア:

[(1, 20129375), (5, 4025875), (7, 2875625), (25, 805175), (35, 575125), (43, 468125), (107, 188125), (125, 161035), (175, 115025), (215, 93625), (301, 66875), (535, 37625), (625, 32207), (749, 26875), (875, 23005), (1075, 18725), (1505, 13375), (2675, 7525), (3745, 5375), (4375, 4601)]