20413720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6991}}^1$

素因数の和:7075

約数の個数: 32

約数和(自身を含む): 46566720

約数和(自身を除く): 26153000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 6991, 13982, 27964, 34955, 55928, 69910, 139820, 279640, 510343, 1020686, 2041372, 2551715, 4082744, 5103430, 10206860, 20413720]

約数ペア:

[(1, 20413720), (2, 10206860), (4, 5103430), (5, 4082744), (8, 2551715), (10, 2041372), (20, 1020686), (40, 510343), (73, 279640), (146, 139820), (292, 69910), (365, 55928), (584, 34955), (730, 27964), (1460, 13982), (2920, 6991)]