31426520

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1979}}^1$

素因数の和:2387

約数の個数: 32

約数和(自身を含む): 70923600

約数和(自身を除く): 39497080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1979, 1985, 3176, 3958, 3970, 7916, 7940, 9895, 15832, 15880, 19790, 39580, 79160, 785663, 1571326, 3142652, 3928315, 6285304, 7856630, 15713260, 31426520]

約数ペア:

[(1, 31426520), (2, 15713260), (4, 7856630), (5, 6285304), (8, 3928315), (10, 3142652), (20, 1571326), (40, 785663), (397, 79160), (794, 39580), (1588, 19790), (1979, 15880), (1985, 15832), (3176, 9895), (3958, 7940), (3970, 7916)]