21291025

素因数分解:

$5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1367}}^1$

素因数の和:1473

約数の個数: 24

約数和(自身を含む): 30533760

約数和(自身を除く): 9242735

約数列:

[1, 5, 7, 25, 35, 89, 175, 445, 623, 1367, 2225, 3115, 6835, 9569, 15575, 34175, 47845, 121663, 239225, 608315, 851641, 3041575, 4258205, 21291025]

約数ペア:

[(1, 21291025), (5, 4258205), (7, 3041575), (25, 851641), (35, 608315), (89, 239225), (175, 121663), (445, 47845), (623, 34175), (1367, 15575), (2225, 9569), (3115, 6835)]