207971145

素因数分解:

$3^4\times 5^1\times {\mathrm{513509}}^1$

素因数の和:513526

約数の個数: 20

約数和(自身を含む): 372808260

約数和(自身を除く): 164837115

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 513509, 1540527, 2567545, 4621581, 7702635, 13864743, 23107905, 41594229, 69323715, 207971145]

約数ペア:

[(1, 207971145), (3, 69323715), (5, 41594229), (9, 23107905), (15, 13864743), (27, 7702635), (45, 4621581), (81, 2567545), (135, 1540527), (405, 513509)]