19894005

素因数分解:

$3^4\times 5^1\times {\mathrm{49121}}^1$

素因数の和:49138

約数の個数: 20

約数和(自身を含む): 35662572

約数和(自身を除く): 15768567

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49121, 147363, 245605, 442089, 736815, 1326267, 2210445, 3978801, 6631335, 19894005]

約数ペア:

[(1, 19894005), (3, 6631335), (5, 3978801), (9, 2210445), (15, 1326267), (27, 736815), (45, 442089), (81, 245605), (135, 147363), (405, 49121)]