21445155

素因数分解:

$3^4\times 5^1\times {\mathrm{52951}}^1$

素因数の和:52968

約数の個数: 20

約数和(自身を含む): 38443152

約数和(自身を除く): 16997997

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52951, 158853, 264755, 476559, 794265, 1429677, 2382795, 4289031, 7148385, 21445155]

約数ペア:

[(1, 21445155), (3, 7148385), (5, 4289031), (9, 2382795), (15, 1429677), (27, 794265), (45, 476559), (81, 264755), (135, 158853), (405, 52951)]