21197740

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14519}}^1$

素因数の和:14601

約数の個数: 24

約数和(自身を含む): 45128160

約数和(自身を除く): 23930420

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14519, 29038, 58076, 72595, 145190, 290380, 1059887, 2119774, 4239548, 5299435, 10598870, 21197740]

約数ペア:

[(1, 21197740), (2, 10598870), (4, 5299435), (5, 4239548), (10, 2119774), (20, 1059887), (73, 290380), (146, 145190), (292, 72595), (365, 58076), (730, 29038), (1460, 14519)]