21109905

素因数分解:

$3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{7951}}^1$

素因数の和:8021

約数の個数: 24

約数和(自身を含む): 37215360

約数和(自身を除く): 16105455

約数列:

[1, 3, 5, 9, 15, 45, 59, 177, 295, 531, 885, 2655, 7951, 23853, 39755, 71559, 119265, 357795, 469109, 1407327, 2345545, 4221981, 7036635, 21109905]

約数ペア:

[(1, 21109905), (3, 7036635), (5, 4221981), (9, 2345545), (15, 1407327), (45, 469109), (59, 357795), (177, 119265), (295, 71559), (531, 39755), (885, 23853), (2655, 7951)]