21176740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1031}}^1$

素因数の和:1132

約数の個数: 48

約数和(自身を含む): 48545280

約数和(自身を除く): 27368540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1031, 1580, 2054, 2062, 4108, 4124, 5135, 5155, 10270, 10310, 13403, 20540, 20620, 26806, 53612, 67015, 81449, 134030, 162898, 268060, 325796, 407245, 814490, 1058837, 1628980, 2117674, 4235348, 5294185, 10588370, 21176740]

約数ペア:

[(1, 21176740), (2, 10588370), (4, 5294185), (5, 4235348), (10, 2117674), (13, 1628980), (20, 1058837), (26, 814490), (52, 407245), (65, 325796), (79, 268060), (130, 162898), (158, 134030), (260, 81449), (316, 67015), (395, 53612), (790, 26806), (1027, 20620), (1031, 20540), (1580, 13403), (2054, 10310), (2062, 10270), (4108, 5155), (4124, 5135)]