643472

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{307}}^1$

素因数の和:446

約数の個数: 20

約数和(自身を含む): 1260336

約数和(自身を除く): 616864

約数列:

[1, 2, 4, 8, 16, 131, 262, 307, 524, 614, 1048, 1228, 2096, 2456, 4912, 40217, 80434, 160868, 321736, 643472]

約数ペア:

[(1, 643472), (2, 321736), (4, 160868), (8, 80434), (16, 40217), (131, 4912), (262, 2456), (307, 2096), (524, 1228), (614, 1048)]