21507680

素因数分解:

$2^5\times 5^1\times {\mathrm{229}}^1\times {\mathrm{587}}^1$

素因数の和:831

約数の個数: 48

約数和(自身を含む): 51120720

約数和(自身を除く): 29613040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 229, 458, 587, 916, 1145, 1174, 1832, 2290, 2348, 2935, 3664, 4580, 4696, 5870, 7328, 9160, 9392, 11740, 18320, 18784, 23480, 36640, 46960, 93920, 134423, 268846, 537692, 672115, 1075384, 1344230, 2150768, 2688460, 4301536, 5376920, 10753840, 21507680]

約数ペア:

[(1, 21507680), (2, 10753840), (4, 5376920), (5, 4301536), (8, 2688460), (10, 2150768), (16, 1344230), (20, 1075384), (32, 672115), (40, 537692), (80, 268846), (160, 134423), (229, 93920), (458, 46960), (587, 36640), (916, 23480), (1145, 18784), (1174, 18320), (1832, 11740), (2290, 9392), (2348, 9160), (2935, 7328), (3664, 5870), (4580, 4696)]