64690840

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{5167}}^1$

素因数の和:5491

約数の個数: 32

約数和(自身を含む): 146047680

約数和(自身を除く): 81356840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 2504, 3130, 5167, 6260, 10334, 12520, 20668, 25835, 41336, 51670, 103340, 206680, 1617271, 3234542, 6469084, 8086355, 12938168, 16172710, 32345420, 64690840]

約数ペア:

[(1, 64690840), (2, 32345420), (4, 16172710), (5, 12938168), (8, 8086355), (10, 6469084), (20, 3234542), (40, 1617271), (313, 206680), (626, 103340), (1252, 51670), (1565, 41336), (2504, 25835), (3130, 20668), (5167, 12520), (6260, 10334)]