21513245

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19469}}^1$

素因数の和:19504

約数の個数: 16

約数和(自身を含む): 29438640

約数和(自身を除く): 7925395

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19469, 97345, 253097, 330973, 1265485, 1654865, 4302649, 21513245]

約数ペア:

[(1, 21513245), (5, 4302649), (13, 1654865), (17, 1265485), (65, 330973), (85, 253097), (221, 97345), (1105, 19469)]