1278485

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:137

約数の個数: 24

約数和(自身を含む): 1778760

約数和(自身を除く): 500275

約数列:

[1, 5, 13, 17, 65, 85, 89, 169, 221, 445, 845, 1105, 1157, 1513, 2873, 5785, 7565, 14365, 15041, 19669, 75205, 98345, 255697, 1278485]

約数ペア:

[(1, 1278485), (5, 255697), (13, 98345), (17, 75205), (65, 19669), (85, 15041), (89, 14365), (169, 7565), (221, 5785), (445, 2873), (845, 1513), (1105, 1157)]