21250755

素因数分解:

$3^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{383}}^1$

素因数の和:537

約数の個数: 40

約数和(自身を含む): 38472192

約数和(自身を除く): 17221437

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 137, 383, 405, 411, 685, 1149, 1233, 1915, 2055, 3447, 3699, 5745, 6165, 10341, 11097, 17235, 18495, 31023, 51705, 52471, 55485, 155115, 157413, 262355, 472239, 787065, 1416717, 2361195, 4250151, 7083585, 21250755]

約数ペア:

[(1, 21250755), (3, 7083585), (5, 4250151), (9, 2361195), (15, 1416717), (27, 787065), (45, 472239), (81, 262355), (135, 157413), (137, 155115), (383, 55485), (405, 52471), (411, 51705), (685, 31023), (1149, 18495), (1233, 17235), (1915, 11097), (2055, 10341), (3447, 6165), (3699, 5745)]