28780520

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{10739}}^1$

素因数の和:10817

約数の個数: 32

約数和(自身を含む): 65728800

約数和(自身を除く): 36948280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 10739, 21478, 42956, 53695, 85912, 107390, 214780, 429560, 719513, 1439026, 2878052, 3597565, 5756104, 7195130, 14390260, 28780520]

約数ペア:

[(1, 28780520), (2, 14390260), (4, 7195130), (5, 5756104), (8, 3597565), (10, 2878052), (20, 1439026), (40, 719513), (67, 429560), (134, 214780), (268, 107390), (335, 85912), (536, 53695), (670, 42956), (1340, 21478), (2680, 10739)]