21001812

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2207}}^1$

素因数の和:2288

約数の個数: 48

約数和(自身を含む): 53663232

約数和(自身を除く): 32661420

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 61, 78, 122, 156, 183, 244, 366, 732, 793, 1586, 2207, 2379, 3172, 4414, 4758, 6621, 8828, 9516, 13242, 26484, 28691, 57382, 86073, 114764, 134627, 172146, 269254, 344292, 403881, 538508, 807762, 1615524, 1750151, 3500302, 5250453, 7000604, 10500906, 21001812]

約数ペア:

[(1, 21001812), (2, 10500906), (3, 7000604), (4, 5250453), (6, 3500302), (12, 1750151), (13, 1615524), (26, 807762), (39, 538508), (52, 403881), (61, 344292), (78, 269254), (122, 172146), (156, 134627), (183, 114764), (244, 86073), (366, 57382), (732, 28691), (793, 26484), (1586, 13242), (2207, 9516), (2379, 8828), (3172, 6621), (4414, 4758)]