21665528

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{439}}^1$

素因数の和:675

約数の個数: 32

約数和(自身を含む): 42240000

約数和(自身を除く): 20574472

約数列:

[1, 2, 4, 8, 31, 62, 124, 199, 248, 398, 439, 796, 878, 1592, 1756, 3512, 6169, 12338, 13609, 24676, 27218, 49352, 54436, 87361, 108872, 174722, 349444, 698888, 2708191, 5416382, 10832764, 21665528]

約数ペア:

[(1, 21665528), (2, 10832764), (4, 5416382), (8, 2708191), (31, 698888), (62, 349444), (124, 174722), (199, 108872), (248, 87361), (398, 54436), (439, 49352), (796, 27218), (878, 24676), (1592, 13609), (1756, 12338), (3512, 6169)]