18906945

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{433}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 31497984

約数和(自身を除く): 12591039

約数列:

[1, 3, 5, 15, 41, 71, 123, 205, 213, 355, 433, 615, 1065, 1299, 2165, 2911, 6495, 8733, 14555, 17753, 30743, 43665, 53259, 88765, 92229, 153715, 266295, 461145, 1260463, 3781389, 6302315, 18906945]

約数ペア:

[(1, 18906945), (3, 6302315), (5, 3781389), (15, 1260463), (41, 461145), (71, 266295), (123, 153715), (205, 92229), (213, 88765), (355, 53259), (433, 43665), (615, 30743), (1065, 17753), (1299, 14555), (2165, 8733), (2911, 6495)]