21070945

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 9265823

約数列:

[1, 5, 7, 35, 37, 53, 185, 259, 265, 307, 371, 1295, 1535, 1855, 1961, 2149, 9805, 10745, 11359, 13727, 16271, 56795, 68635, 79513, 81355, 113897, 397565, 569485, 602027, 3010135, 4214189, 21070945]

約数ペア:

[(1, 21070945), (5, 4214189), (7, 3010135), (35, 602027), (37, 569485), (53, 397565), (185, 113897), (259, 81355), (265, 79513), (307, 68635), (371, 56795), (1295, 16271), (1535, 13727), (1855, 11359), (1961, 10745), (2149, 9805)]