21289828

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{167}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 44593920

約数和(自身を除く): 23304092

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 157, 167, 203, 314, 334, 406, 628, 668, 812, 1099, 1169, 2198, 2338, 4396, 4553, 4676, 4843, 9106, 9686, 18212, 19372, 26219, 31871, 33901, 52438, 63742, 67802, 104876, 127484, 135604, 183533, 367066, 734132, 760351, 1520702, 3041404, 5322457, 10644914, 21289828]

約数ペア:

[(1, 21289828), (2, 10644914), (4, 5322457), (7, 3041404), (14, 1520702), (28, 760351), (29, 734132), (58, 367066), (116, 183533), (157, 135604), (167, 127484), (203, 104876), (314, 67802), (334, 63742), (406, 52438), (628, 33901), (668, 31871), (812, 26219), (1099, 19372), (1169, 18212), (2198, 9686), (2338, 9106), (4396, 4843), (4553, 4676)]