21028204

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{179}}^1\times {\mathrm{683}}^1$

素因数の和:909

約数の個数: 24

約数和(自身を含む): 37920960

約数和(自身を除く): 16892756

約数列:

[1, 2, 4, 43, 86, 172, 179, 358, 683, 716, 1366, 2732, 7697, 15394, 29369, 30788, 58738, 117476, 122257, 244514, 489028, 5257051, 10514102, 21028204]

約数ペア:

[(1, 21028204), (2, 10514102), (4, 5257051), (43, 489028), (86, 244514), (172, 122257), (179, 117476), (358, 58738), (683, 30788), (716, 29369), (1366, 15394), (2732, 7697)]