20279925

素因数分解:

$3^2\times 5^2\times {\mathrm{173}}^1\times {\mathrm{521}}^1$

素因数の和:710

約数の個数: 36

約数和(自身を含む): 36603684

約数和(自身を除く): 16323759

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 173, 225, 519, 521, 865, 1557, 1563, 2595, 2605, 4325, 4689, 7785, 7815, 12975, 13025, 23445, 38925, 39075, 90133, 117225, 270399, 450665, 811197, 1351995, 2253325, 4055985, 6759975, 20279925]

約数ペア:

[(1, 20279925), (3, 6759975), (5, 4055985), (9, 2253325), (15, 1351995), (25, 811197), (45, 450665), (75, 270399), (173, 117225), (225, 90133), (519, 39075), (521, 38925), (865, 23445), (1557, 13025), (1563, 12975), (2595, 7815), (2605, 7785), (4325, 4689)]