21659144

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208261}}^1$

素因数の和:208280

約数の個数: 16

約数和(自身を含む): 43735020

約数和(自身を除く): 22075876

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208261, 416522, 833044, 1666088, 2707393, 5414786, 10829572, 21659144]

約数ペア:

[(1, 21659144), (2, 10829572), (4, 5414786), (8, 2707393), (13, 1666088), (26, 833044), (52, 416522), (104, 208261)]