21587540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1051}}^1$

素因数の和:1152

約数の個数: 48

約数和(自身を含む): 49486080

約数和(自身を除く): 27898540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1051, 1580, 2054, 2102, 4108, 4204, 5135, 5255, 10270, 10510, 13663, 20540, 21020, 27326, 54652, 68315, 83029, 136630, 166058, 273260, 332116, 415145, 830290, 1079377, 1660580, 2158754, 4317508, 5396885, 10793770, 21587540]

約数ペア:

[(1, 21587540), (2, 10793770), (4, 5396885), (5, 4317508), (10, 2158754), (13, 1660580), (20, 1079377), (26, 830290), (52, 415145), (65, 332116), (79, 273260), (130, 166058), (158, 136630), (260, 83029), (316, 68315), (395, 54652), (790, 27326), (1027, 21020), (1051, 20540), (1580, 13663), (2054, 10510), (2102, 10270), (4108, 5255), (4204, 5135)]