21498490

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12721}}^1$

素因数の和:12754

約数の個数: 24

約数和(自身を含む): 41906268

約数和(自身を除く): 20407778

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12721, 25442, 63605, 127210, 165373, 330746, 826865, 1653730, 2149849, 4299698, 10749245, 21498490]

約数ペア:

[(1, 21498490), (2, 10749245), (5, 4299698), (10, 2149849), (13, 1653730), (26, 826865), (65, 330746), (130, 165373), (169, 127210), (338, 63605), (845, 25442), (1690, 12721)]