20216995

素因数分解:

$5^1\times {\mathrm{17}}^3\times {\mathrm{823}}^1$

素因数の和:879

約数の個数: 16

約数和(自身を含む): 25807680

約数和(自身を除く): 5590685

約数列:

[1, 5, 17, 85, 289, 823, 1445, 4115, 4913, 13991, 24565, 69955, 237847, 1189235, 4043399, 20216995]

約数ペア:

[(1, 20216995), (5, 4043399), (17, 1189235), (85, 237847), (289, 69955), (823, 24565), (1445, 13991), (4115, 4913)]