20872515

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{81853}}^1$

素因数の和:81878

約数の個数: 16

約数和(自身を含む): 35360928

約数和(自身を除く): 14488413

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 81853, 245559, 409265, 1227795, 1391501, 4174503, 6957505, 20872515]

約数ペア:

[(1, 20872515), (3, 6957505), (5, 4174503), (15, 1391501), (17, 1227795), (51, 409265), (85, 245559), (255, 81853)]