20815172

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{15817}}^1$

素因数の和:15875

約数の個数: 24

約数和(自身を含む): 42518784

約数和(自身を除く): 21703612

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 15817, 31634, 63268, 110719, 221438, 442876, 743399, 1486798, 2973596, 5203793, 10407586, 20815172]

約数ペア:

[(1, 20815172), (2, 10407586), (4, 5203793), (7, 2973596), (14, 1486798), (28, 743399), (47, 442876), (94, 221438), (188, 110719), (329, 63268), (658, 31634), (1316, 15817)]