21396925

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2683}}^1$

素因数の和:2733

約数の個数: 24

約数和(自身を含む): 29953440

約数和(自身を除く): 8556515

約数列:

[1, 5, 11, 25, 29, 55, 145, 275, 319, 725, 1595, 2683, 7975, 13415, 29513, 67075, 77807, 147565, 389035, 737825, 855877, 1945175, 4279385, 21396925]

約数ペア:

[(1, 21396925), (5, 4279385), (11, 1945175), (25, 855877), (29, 737825), (55, 389035), (145, 147565), (275, 77807), (319, 67075), (725, 29513), (1595, 13415), (2683, 7975)]