19865655

素因数分解:

$3^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{271}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 35939904

約数和(自身を除く): 16074249

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 181, 271, 405, 543, 813, 905, 1355, 1629, 2439, 2715, 4065, 4887, 7317, 8145, 12195, 14661, 21951, 24435, 36585, 49051, 73305, 109755, 147153, 245255, 441459, 735765, 1324377, 2207295, 3973131, 6621885, 19865655]

約数ペア:

[(1, 19865655), (3, 6621885), (5, 3973131), (9, 2207295), (15, 1324377), (27, 735765), (45, 441459), (81, 245255), (135, 147153), (181, 109755), (271, 73305), (405, 49051), (543, 36585), (813, 24435), (905, 21951), (1355, 14661), (1629, 12195), (2439, 8145), (2715, 7317), (4065, 4887)]