20847475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^2$

素因数の和:148

約数の個数: 36

約数和(自身を含む): 29576232

約数和(自身を除く): 8728757

約数列:

[1, 5, 11, 25, 41, 43, 55, 205, 215, 275, 451, 473, 1025, 1075, 1763, 1849, 2255, 2365, 8815, 9245, 11275, 11825, 19393, 20339, 44075, 46225, 75809, 96965, 101695, 379045, 484825, 508475, 833899, 1895225, 4169495, 20847475]

約数ペア:

[(1, 20847475), (5, 4169495), (11, 1895225), (25, 833899), (41, 508475), (43, 484825), (55, 379045), (205, 101695), (215, 96965), (275, 75809), (451, 46225), (473, 44075), (1025, 20339), (1075, 19393), (1763, 11825), (1849, 11275), (2255, 9245), (2365, 8815)]