21161115

素因数分解:

$3^3\times 5^1\times {\mathrm{156749}}^1$

素因数の和:156763

約数の個数: 16

約数和(自身を含む): 37620000

約数和(自身を除く): 16458885

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156749, 470247, 783745, 1410741, 2351235, 4232223, 7053705, 21161115]

約数ペア:

[(1, 21161115), (3, 7053705), (5, 4232223), (9, 2351235), (15, 1410741), (27, 783745), (45, 470247), (135, 156749)]