20725785

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10711}}^1$

素因数の和:10765

約数の個数: 24

約数和(自身を含む): 36763584

約数和(自身を除く): 16037799

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10711, 32133, 53555, 96399, 160665, 460573, 481995, 1381719, 2302865, 4145157, 6908595, 20725785]

約数ペア:

[(1, 20725785), (3, 6908595), (5, 4145157), (9, 2302865), (15, 1381719), (43, 481995), (45, 460573), (129, 160665), (215, 96399), (387, 53555), (645, 32133), (1935, 10711)]