81436940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313219}}^1$

素因数の和:313241

約数の個数: 24

約数和(自身を含む): 184173360

約数和(自身を除く): 102736420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313219, 626438, 1252876, 1566095, 3132190, 4071847, 6264380, 8143694, 16287388, 20359235, 40718470, 81436940]

約数ペア:

[(1, 81436940), (2, 40718470), (4, 20359235), (5, 16287388), (10, 8143694), (13, 6264380), (20, 4071847), (26, 3132190), (52, 1566095), (65, 1252876), (130, 626438), (260, 313219)]