20847880

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4871}}^1$

素因数の和:4989

約数の個数: 32

約数和(自身を含む): 47355840

約数和(自身を除く): 26507960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4871, 9742, 19484, 24355, 38968, 48710, 97420, 194840, 521197, 1042394, 2084788, 2605985, 4169576, 5211970, 10423940, 20847880]

約数ペア:

[(1, 20847880), (2, 10423940), (4, 5211970), (5, 4169576), (8, 2605985), (10, 2084788), (20, 1042394), (40, 521197), (107, 194840), (214, 97420), (428, 48710), (535, 38968), (856, 24355), (1070, 19484), (2140, 9742), (4280, 4871)]