20777980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25339}}^1$

素因数の和:25389

約数の個数: 24

約数和(自身を含む): 44699760

約数和(自身を除く): 23921780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25339, 50678, 101356, 126695, 253390, 506780, 1038899, 2077798, 4155596, 5194495, 10388990, 20777980]

約数ペア:

[(1, 20777980), (2, 10388990), (4, 5194495), (5, 4155596), (10, 2077798), (20, 1038899), (41, 506780), (82, 253390), (164, 126695), (205, 101356), (410, 50678), (820, 25339)]