256815

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{439}}^1$

素因数の和:463

約数の個数: 24

約数和(自身を含む): 480480

約数和(自身を除く): 223665

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 439, 585, 1317, 2195, 3951, 5707, 6585, 17121, 19755, 28535, 51363, 85605, 256815]

約数ペア:

[(1, 256815), (3, 85605), (5, 51363), (9, 28535), (13, 19755), (15, 17121), (39, 6585), (45, 5707), (65, 3951), (117, 2195), (195, 1317), (439, 585)]