20730680

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1871}}^1$

素因数の和:2159

約数の個数: 32

約数和(自身を含む): 46837440

約数和(自身を除く): 26106760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1871, 2216, 2770, 3742, 5540, 7484, 9355, 11080, 14968, 18710, 37420, 74840, 518267, 1036534, 2073068, 2591335, 4146136, 5182670, 10365340, 20730680]

約数ペア:

[(1, 20730680), (2, 10365340), (4, 5182670), (5, 4146136), (8, 2591335), (10, 2073068), (20, 1036534), (40, 518267), (277, 74840), (554, 37420), (1108, 18710), (1385, 14968), (1871, 11080), (2216, 9355), (2770, 7484), (3742, 5540)]