20870840

素因数分解:

$2^3\times 5^1\times {\mathrm{313}}^1\times {\mathrm{1667}}^1$

素因数の和:1991

約数の個数: 32

約数和(自身を含む): 47137680

約数和(自身を除く): 26266840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 313, 626, 1252, 1565, 1667, 2504, 3130, 3334, 6260, 6668, 8335, 12520, 13336, 16670, 33340, 66680, 521771, 1043542, 2087084, 2608855, 4174168, 5217710, 10435420, 20870840]

約数ペア:

[(1, 20870840), (2, 10435420), (4, 5217710), (5, 4174168), (8, 2608855), (10, 2087084), (20, 1043542), (40, 521771), (313, 66680), (626, 33340), (1252, 16670), (1565, 13336), (1667, 12520), (2504, 8335), (3130, 6668), (3334, 6260)]