81399140

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{24371}}^1$

素因数の和:24547

約数の個数: 24

約数和(自身を含む): 171968832

約数和(自身を除く): 90569692

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 24371, 48742, 97484, 121855, 243710, 487420, 4069957, 8139914, 16279828, 20349785, 40699570, 81399140]

約数ペア:

[(1, 81399140), (2, 40699570), (4, 20349785), (5, 16279828), (10, 8139914), (20, 4069957), (167, 487420), (334, 243710), (668, 121855), (835, 97484), (1670, 48742), (3340, 24371)]