20421388

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{9133}}^1$

素因数の和:9193

約数の個数: 24

約数和(自身を含む): 39385808

約数和(自身を除く): 18964420

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 559, 1118, 2236, 9133, 18266, 36532, 118729, 237458, 392719, 474916, 785438, 1570876, 5105347, 10210694, 20421388]

約数ペア:

[(1, 20421388), (2, 10210694), (4, 5105347), (13, 1570876), (26, 785438), (43, 474916), (52, 392719), (86, 237458), (172, 118729), (559, 36532), (1118, 18266), (2236, 9133)]