20679705

素因数分解:

$3^4\times 5^1\times {\mathrm{51061}}^1$

素因数の和:51078

約数の個数: 20

約数和(自身を含む): 37071012

約数和(自身を除く): 16391307

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51061, 153183, 255305, 459549, 765915, 1378647, 2297745, 4135941, 6893235, 20679705]

約数ペア:

[(1, 20679705), (3, 6893235), (5, 4135941), (9, 2297745), (15, 1378647), (27, 765915), (45, 459549), (81, 255305), (135, 153183), (405, 51061)]