21344720

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{727}}^1$

素因数の和:1107

約数の個数: 40

約数和(自身を含む): 49830144

約数和(自身を除く): 28485424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 727, 734, 1454, 1468, 1835, 2908, 2936, 3635, 3670, 5816, 5872, 7270, 7340, 11632, 14540, 14680, 29080, 29360, 58160, 266809, 533618, 1067236, 1334045, 2134472, 2668090, 4268944, 5336180, 10672360, 21344720]

約数ペア:

[(1, 21344720), (2, 10672360), (4, 5336180), (5, 4268944), (8, 2668090), (10, 2134472), (16, 1334045), (20, 1067236), (40, 533618), (80, 266809), (367, 58160), (727, 29360), (734, 29080), (1454, 14680), (1468, 14540), (1835, 11632), (2908, 7340), (2936, 7270), (3635, 5872), (3670, 5816)]