721305

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1$

素因数の和:167

約数の個数: 40

約数和(自身を含む): 1402632

約数和(自身を除く): 681327

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 137, 195, 351, 405, 411, 585, 685, 1053, 1233, 1755, 1781, 2055, 3699, 5265, 5343, 6165, 8905, 11097, 16029, 18495, 26715, 48087, 55485, 80145, 144261, 240435, 721305]

約数ペア:

[(1, 721305), (3, 240435), (5, 144261), (9, 80145), (13, 55485), (15, 48087), (27, 26715), (39, 18495), (45, 16029), (65, 11097), (81, 8905), (117, 6165), (135, 5343), (137, 5265), (195, 3699), (351, 2055), (405, 1781), (411, 1755), (585, 1233), (685, 1053)]