648940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 1384992

約数和(自身を除く): 736052

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 457, 710, 914, 1420, 1828, 2285, 4570, 9140, 32447, 64894, 129788, 162235, 324470, 648940]

約数ペア:

[(1, 648940), (2, 324470), (4, 162235), (5, 129788), (10, 64894), (20, 32447), (71, 9140), (142, 4570), (284, 2285), (355, 1828), (457, 1420), (710, 914)]