21250395

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12763}}^1$

素因数の和:12811

約数の個数: 24

約数和(自身を含む): 37832496

約数和(自身を除く): 16582101

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12763, 38289, 63815, 114867, 191445, 472231, 574335, 1416693, 2361155, 4250079, 7083465, 21250395]

約数ペア:

[(1, 21250395), (3, 7083465), (5, 4250079), (9, 2361155), (15, 1416693), (37, 574335), (45, 472231), (111, 191445), (185, 114867), (333, 63815), (555, 38289), (1665, 12763)]