1290680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:839

約数の個数: 32

約数和(自身を含む): 2978640

約数和(自身を除く): 1687960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 787, 820, 1574, 1640, 3148, 3935, 6296, 7870, 15740, 31480, 32267, 64534, 129068, 161335, 258136, 322670, 645340, 1290680]

約数ペア:

[(1, 1290680), (2, 645340), (4, 322670), (5, 258136), (8, 161335), (10, 129068), (20, 64534), (40, 32267), (41, 31480), (82, 15740), (164, 7870), (205, 6296), (328, 3935), (410, 3148), (787, 1640), (820, 1574)]