21627277

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{151}}^1$

素因数の和:281

約数の個数: 24

約数和(自身を含む): 26338560

約数和(自身を除く): 4711283

約数列:

[1, 7, 37, 49, 79, 151, 259, 553, 1057, 1813, 2923, 3871, 5587, 7399, 11929, 20461, 39109, 83503, 143227, 273763, 441373, 584521, 3089611, 21627277]

約数ペア:

[(1, 21627277), (7, 3089611), (37, 584521), (49, 441373), (79, 273763), (151, 143227), (259, 83503), (553, 39109), (1057, 20461), (1813, 11929), (2923, 7399), (3871, 5587)]