21291095

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{401}}^1$

素因数の和:491

約数の個数: 32

約数和(自身を含む): 30796416

約数和(自身を除く): 9505321

約数列:

[1, 5, 7, 35, 37, 41, 185, 205, 259, 287, 401, 1295, 1435, 1517, 2005, 2807, 7585, 10619, 14035, 14837, 16441, 53095, 74185, 82205, 103859, 115087, 519295, 575435, 608317, 3041585, 4258219, 21291095]

約数ペア:

[(1, 21291095), (5, 4258219), (7, 3041585), (35, 608317), (37, 575435), (41, 519295), (185, 115087), (205, 103859), (259, 82205), (287, 74185), (401, 53095), (1295, 16441), (1435, 14837), (1517, 14035), (2005, 10619), (2807, 7585)]