20906145

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2749}}^1$

素因数の和:2786

約数の個数: 36

約数和(自身を含む): 39253500

約数和(自身を除く): 18347355

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 169, 195, 507, 585, 845, 1521, 2535, 2749, 7605, 8247, 13745, 24741, 35737, 41235, 107211, 123705, 178685, 321633, 464581, 536055, 1393743, 1608165, 2322905, 4181229, 6968715, 20906145]

約数ペア:

[(1, 20906145), (3, 6968715), (5, 4181229), (9, 2322905), (13, 1608165), (15, 1393743), (39, 536055), (45, 464581), (65, 321633), (117, 178685), (169, 123705), (195, 107211), (507, 41235), (585, 35737), (845, 24741), (1521, 13745), (2535, 8247), (2749, 7605)]