18218980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{887}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 41771520

約数和(自身を除く): 23552540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 887, 1027, 1580, 1774, 2054, 3548, 4108, 4435, 5135, 8870, 10270, 11531, 17740, 20540, 23062, 46124, 57655, 70073, 115310, 140146, 230620, 280292, 350365, 700730, 910949, 1401460, 1821898, 3643796, 4554745, 9109490, 18218980]

約数ペア:

[(1, 18218980), (2, 9109490), (4, 4554745), (5, 3643796), (10, 1821898), (13, 1401460), (20, 910949), (26, 700730), (52, 350365), (65, 280292), (79, 230620), (130, 140146), (158, 115310), (260, 70073), (316, 57655), (395, 46124), (790, 23062), (887, 20540), (1027, 17740), (1580, 11531), (1774, 10270), (2054, 8870), (3548, 5135), (4108, 4435)]