21201315

素因数分解:

$3^1\times 5^1\times {\mathrm{853}}^1\times {\mathrm{1657}}^1$

素因数の和:2518

約数の個数: 16

約数和(自身を含む): 33982368

約数和(自身を除く): 12781053

約数列:

[1, 3, 5, 15, 853, 1657, 2559, 4265, 4971, 8285, 12795, 24855, 1413421, 4240263, 7067105, 21201315]

約数ペア:

[(1, 21201315), (3, 7067105), (5, 4240263), (15, 1413421), (853, 24855), (1657, 12795), (2559, 8285), (4265, 4971)]