21578416

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{307}}^1$

素因数の和:529

約数の個数: 40

約数和(自身を含む): 43997184

約数和(自身を除く): 22418768

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 191, 307, 368, 382, 614, 764, 1228, 1528, 2456, 3056, 4393, 4912, 7061, 8786, 14122, 17572, 28244, 35144, 56488, 58637, 70288, 112976, 117274, 234548, 469096, 938192, 1348651, 2697302, 5394604, 10789208, 21578416]

約数ペア:

[(1, 21578416), (2, 10789208), (4, 5394604), (8, 2697302), (16, 1348651), (23, 938192), (46, 469096), (92, 234548), (184, 117274), (191, 112976), (307, 70288), (368, 58637), (382, 56488), (614, 35144), (764, 28244), (1228, 17572), (1528, 14122), (2456, 8786), (3056, 7061), (4393, 4912)]