205386920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{2777}}^1$

素因数の和:2874

約数の個数: 48

約数和(自身を含む): 473287860

約数和(自身を除く): 267900940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 1849, 2777, 3698, 5554, 7396, 9245, 11108, 13885, 14792, 18490, 22216, 27770, 36980, 55540, 73960, 111080, 119411, 238822, 477644, 597055, 955288, 1194110, 2388220, 4776440, 5134673, 10269346, 20538692, 25673365, 41077384, 51346730, 102693460, 205386920]

約数ペア:

[(1, 205386920), (2, 102693460), (4, 51346730), (5, 41077384), (8, 25673365), (10, 20538692), (20, 10269346), (40, 5134673), (43, 4776440), (86, 2388220), (172, 1194110), (215, 955288), (344, 597055), (430, 477644), (860, 238822), (1720, 119411), (1849, 111080), (2777, 73960), (3698, 55540), (5554, 36980), (7396, 27770), (9245, 22216), (11108, 18490), (13885, 14792)]