21050155

素因数分解:

$5^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{569}}^1$

素因数の和:739

約数の個数: 24

約数和(自身を含む): 29630880

約数和(自身を除く): 8580725

約数列:

[1, 5, 7, 35, 49, 151, 245, 569, 755, 1057, 2845, 3983, 5285, 7399, 19915, 27881, 36995, 85919, 139405, 429595, 601433, 3007165, 4210031, 21050155]

約数ペア:

[(1, 21050155), (5, 4210031), (7, 3007165), (35, 601433), (49, 429595), (151, 139405), (245, 85919), (569, 36995), (755, 27881), (1057, 19915), (2845, 7399), (3983, 5285)]