21389485

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1489}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 29448360

約数和(自身を除く): 8058875

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 1489, 2873, 7445, 14365, 19357, 25313, 96785, 126565, 251641, 329069, 1258205, 1645345, 4277897, 21389485]

約数ペア:

[(1, 21389485), (5, 4277897), (13, 1645345), (17, 1258205), (65, 329069), (85, 251641), (169, 126565), (221, 96785), (845, 25313), (1105, 19357), (1489, 14365), (2873, 7445)]