21527720

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1033}}^1$

素因数の和:1565

約数の個数: 32

約数和(自身を含む): 48577320

約数和(自身を除く): 27049600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1033, 1042, 2066, 2084, 2605, 4132, 4168, 5165, 5210, 8264, 10330, 10420, 20660, 20840, 41320, 538193, 1076386, 2152772, 2690965, 4305544, 5381930, 10763860, 21527720]

約数ペア:

[(1, 21527720), (2, 10763860), (4, 5381930), (5, 4305544), (8, 2690965), (10, 2152772), (20, 1076386), (40, 538193), (521, 41320), (1033, 20840), (1042, 20660), (2066, 10420), (2084, 10330), (2605, 8264), (4132, 5210), (4168, 5165)]