1200015

素因数分解:

$3^4\times 5^1\times {\mathrm{2963}}^1$

素因数の和:2980

約数の個数: 20

約数和(自身を含む): 2151864

約数和(自身を除く): 951849

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 2963, 8889, 14815, 26667, 44445, 80001, 133335, 240003, 400005, 1200015]

約数ペア:

[(1, 1200015), (3, 400005), (5, 240003), (9, 133335), (15, 80001), (27, 44445), (45, 26667), (81, 14815), (135, 8889), (405, 2963)]