21497903

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{773}}^1$

素因数の和:946

約数の個数: 16

約数和(自身を含む): 25634880

約数和(自身を除く): 4136977

約数列:

[1, 7, 29, 137, 203, 773, 959, 3973, 5411, 22417, 27811, 105901, 156919, 741307, 3071129, 21497903]

約数ペア:

[(1, 21497903), (7, 3071129), (29, 741307), (137, 156919), (203, 105901), (773, 27811), (959, 22417), (3973, 5411)]