1280680

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{317}}^1$

素因数の和:429

約数の個数: 32

約数和(自身を含む): 2919240

約数和(自身を除く): 1638560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 317, 404, 505, 634, 808, 1010, 1268, 1585, 2020, 2536, 3170, 4040, 6340, 12680, 32017, 64034, 128068, 160085, 256136, 320170, 640340, 1280680]

約数ペア:

[(1, 1280680), (2, 640340), (4, 320170), (5, 256136), (8, 160085), (10, 128068), (20, 64034), (40, 32017), (101, 12680), (202, 6340), (317, 4040), (404, 3170), (505, 2536), (634, 2020), (808, 1585), (1010, 1268)]