21290620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6299}}^1$

素因数の和:6334

約数の個数: 36

約数和(自身を含む): 48421800

約数和(自身を除く): 27131180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6299, 12598, 25196, 31495, 62990, 81887, 125980, 163774, 327548, 409435, 818870, 1064531, 1637740, 2129062, 4258124, 5322655, 10645310, 21290620]

約数ペア:

[(1, 21290620), (2, 10645310), (4, 5322655), (5, 4258124), (10, 2129062), (13, 1637740), (20, 1064531), (26, 818870), (52, 409435), (65, 327548), (130, 163774), (169, 125980), (260, 81887), (338, 62990), (676, 31495), (845, 25196), (1690, 12598), (3380, 6299)]