21241420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{757}}^1$

素因数の和:850

約数の個数: 48

約数和(自身を含む): 47371968

約数和(自身を除く): 26130548

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 61, 92, 115, 122, 230, 244, 305, 460, 610, 757, 1220, 1403, 1514, 2806, 3028, 3785, 5612, 7015, 7570, 14030, 15140, 17411, 28060, 34822, 46177, 69644, 87055, 92354, 174110, 184708, 230885, 348220, 461770, 923540, 1062071, 2124142, 4248284, 5310355, 10620710, 21241420]

約数ペア:

[(1, 21241420), (2, 10620710), (4, 5310355), (5, 4248284), (10, 2124142), (20, 1062071), (23, 923540), (46, 461770), (61, 348220), (92, 230885), (115, 184708), (122, 174110), (230, 92354), (244, 87055), (305, 69644), (460, 46177), (610, 34822), (757, 28060), (1220, 17411), (1403, 15140), (1514, 14030), (2806, 7570), (3028, 7015), (3785, 5612)]