204416980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{2801}}^1$

素因数の和:2940

約数の個数: 48

約数和(自身を含む): 444845520

約数和(自身を除く): 240428540

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 89, 164, 178, 205, 356, 410, 445, 820, 890, 1780, 2801, 3649, 5602, 7298, 11204, 14005, 14596, 18245, 28010, 36490, 56020, 72980, 114841, 229682, 249289, 459364, 498578, 574205, 997156, 1148410, 1246445, 2296820, 2492890, 4985780, 10220849, 20441698, 40883396, 51104245, 102208490, 204416980]

約数ペア:

[(1, 204416980), (2, 102208490), (4, 51104245), (5, 40883396), (10, 20441698), (20, 10220849), (41, 4985780), (82, 2492890), (89, 2296820), (164, 1246445), (178, 1148410), (205, 997156), (356, 574205), (410, 498578), (445, 459364), (820, 249289), (890, 229682), (1780, 114841), (2801, 72980), (3649, 56020), (5602, 36490), (7298, 28010), (11204, 18245), (14005, 14596)]