21981040420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1\times {\mathrm{89303}}^1$

素因数の和:89740

約数の個数: 48

約数和(自身を含む): 47769781248

約数和(自身を除く): 25788740828

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 397, 620, 794, 1588, 1985, 3970, 7940, 12307, 24614, 49228, 61535, 89303, 123070, 178606, 246140, 357212, 446515, 893030, 1786060, 2768393, 5536786, 11073572, 13841965, 27683930, 35453291, 55367860, 70906582, 141813164, 177266455, 354532910, 709065820, 1099052021, 2198104042, 4396208084, 5495260105, 10990520210, 21981040420]

約数ペア:

[(1, 21981040420), (2, 10990520210), (4, 5495260105), (5, 4396208084), (10, 2198104042), (20, 1099052021), (31, 709065820), (62, 354532910), (124, 177266455), (155, 141813164), (310, 70906582), (397, 55367860), (620, 35453291), (794, 27683930), (1588, 13841965), (1985, 11073572), (3970, 5536786), (7940, 2768393), (12307, 1786060), (24614, 893030), (49228, 446515), (61535, 357212), (89303, 246140), (123070, 178606)]