20102740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:377

約数の個数: 72

約数和(自身を含む): 49957992

約数和(自身を除く): 29855252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 73, 98, 140, 146, 196, 245, 281, 292, 365, 490, 511, 562, 730, 980, 1022, 1124, 1405, 1460, 1967, 2044, 2555, 2810, 3577, 3934, 5110, 5620, 7154, 7868, 9835, 10220, 13769, 14308, 17885, 19670, 20513, 27538, 35770, 39340, 41026, 55076, 68845, 71540, 82052, 102565, 137690, 143591, 205130, 275380, 287182, 410260, 574364, 717955, 1005137, 1435910, 2010274, 2871820, 4020548, 5025685, 10051370, 20102740]

約数ペア:

[(1, 20102740), (2, 10051370), (4, 5025685), (5, 4020548), (7, 2871820), (10, 2010274), (14, 1435910), (20, 1005137), (28, 717955), (35, 574364), (49, 410260), (70, 287182), (73, 275380), (98, 205130), (140, 143591), (146, 137690), (196, 102565), (245, 82052), (281, 71540), (292, 68845), (365, 55076), (490, 41026), (511, 39340), (562, 35770), (730, 27538), (980, 20513), (1022, 19670), (1124, 17885), (1405, 14308), (1460, 13769), (1967, 10220), (2044, 9835), (2555, 7868), (2810, 7154), (3577, 5620), (3934, 5110)]