21790288

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104761}}^1$

素因数の和:104782

約数の個数: 20

約数和(自身を含む): 45466708

約数和(自身を除く): 23676420

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104761, 209522, 419044, 838088, 1361893, 1676176, 2723786, 5447572, 10895144, 21790288]

約数ペア:

[(1, 21790288), (2, 10895144), (4, 5447572), (8, 2723786), (13, 1676176), (16, 1361893), (26, 838088), (52, 419044), (104, 209522), (208, 104761)]