1200000015

素因数分解:

$3^4\times 5^1\times {\mathrm{2962963}}^1$

素因数の和:2962980

約数の個数: 20

約数和(自身を含む): 2151111864

約数和(自身を除く): 951111849

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 2962963, 8888889, 14814815, 26666667, 44444445, 80000001, 133333335, 240000003, 400000005, 1200000015]

約数ペア:

[(1, 1200000015), (3, 400000005), (5, 240000003), (9, 133333335), (15, 80000001), (27, 44444445), (45, 26666667), (81, 14814815), (135, 8888889), (405, 2962963)]