20125420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{4957}}^1$

素因数の和:5002

約数の個数: 48

約数和(自身を含む): 49976640

約数和(自身を除く): 29851220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 4957, 9914, 19828, 24785, 34699, 49570, 69398, 99140, 138796, 143753, 173495, 287506, 346990, 575012, 693980, 718765, 1006271, 1437530, 2012542, 2875060, 4025084, 5031355, 10062710, 20125420]

約数ペア:

[(1, 20125420), (2, 10062710), (4, 5031355), (5, 4025084), (7, 2875060), (10, 2012542), (14, 1437530), (20, 1006271), (28, 718765), (29, 693980), (35, 575012), (58, 346990), (70, 287506), (116, 173495), (140, 143753), (145, 138796), (203, 99140), (290, 69398), (406, 49570), (580, 34699), (812, 24785), (1015, 19828), (2030, 9914), (4060, 4957)]