21105968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{3499}}^1$

素因数の和:3549

約数の個数: 40

約数和(自身を含む): 45570000

約数和(自身を除く): 24464032

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 52, 58, 104, 116, 208, 232, 377, 464, 754, 1508, 3016, 3499, 6032, 6998, 13996, 27992, 45487, 55984, 90974, 101471, 181948, 202942, 363896, 405884, 727792, 811768, 1319123, 1623536, 2638246, 5276492, 10552984, 21105968]

約数ペア:

[(1, 21105968), (2, 10552984), (4, 5276492), (8, 2638246), (13, 1623536), (16, 1319123), (26, 811768), (29, 727792), (52, 405884), (58, 363896), (104, 202942), (116, 181948), (208, 101471), (232, 90974), (377, 55984), (464, 45487), (754, 27992), (1508, 13996), (3016, 6998), (3499, 6032)]