21720452

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{2099}}^1$

素因数の和:2315

約数の個数: 24

約数和(自身を含む): 41160000

約数和(自身を除く): 19439548

約数列:

[1, 2, 4, 13, 26, 52, 199, 398, 796, 2099, 2587, 4198, 5174, 8396, 10348, 27287, 54574, 109148, 417701, 835402, 1670804, 5430113, 10860226, 21720452]

約数ペア:

[(1, 21720452), (2, 10860226), (4, 5430113), (13, 1670804), (26, 835402), (52, 417701), (199, 109148), (398, 54574), (796, 27287), (2099, 10348), (2587, 8396), (4198, 5174)]