20890233

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1109}}^1$

素因数の和:1158

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 17897607

約数列:

[1, 3, 7, 9, 13, 21, 23, 39, 63, 69, 91, 117, 161, 207, 273, 299, 483, 819, 897, 1109, 1449, 2093, 2691, 3327, 6279, 7763, 9981, 14417, 18837, 23289, 25507, 43251, 69867, 76521, 100919, 129753, 178549, 229563, 302757, 331591, 535647, 908271, 994773, 1606941, 2321137, 2984319, 6963411, 20890233]

約数ペア:

[(1, 20890233), (3, 6963411), (7, 2984319), (9, 2321137), (13, 1606941), (21, 994773), (23, 908271), (39, 535647), (63, 331591), (69, 302757), (91, 229563), (117, 178549), (161, 129753), (207, 100919), (273, 76521), (299, 69867), (483, 43251), (819, 25507), (897, 23289), (1109, 18837), (1449, 14417), (2093, 9981), (2691, 7763), (3327, 6279)]