21291820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5693}}^1$

素因数の和:5730

約数の個数: 48

約数和(自身を含む): 51655968

約数和(自身を除く): 30364148

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5693, 11386, 22772, 28465, 56930, 62623, 96781, 113860, 125246, 193562, 250492, 313115, 387124, 483905, 626230, 967810, 1064591, 1252460, 1935620, 2129182, 4258364, 5322955, 10645910, 21291820]

約数ペア:

[(1, 21291820), (2, 10645910), (4, 5322955), (5, 4258364), (10, 2129182), (11, 1935620), (17, 1252460), (20, 1064591), (22, 967810), (34, 626230), (44, 483905), (55, 387124), (68, 313115), (85, 250492), (110, 193562), (170, 125246), (187, 113860), (220, 96781), (340, 62623), (374, 56930), (748, 28465), (935, 22772), (1870, 11386), (3740, 5693)]