20914640

素因数分解:

$2^4\times 5^1\times {\mathrm{261433}}^1$

素因数の和:261446

約数の個数: 20

約数和(自身を含む): 48626724

約数和(自身を除く): 27712084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261433, 522866, 1045732, 1307165, 2091464, 2614330, 4182928, 5228660, 10457320, 20914640]

約数ペア:

[(1, 20914640), (2, 10457320), (4, 5228660), (5, 4182928), (8, 2614330), (10, 2091464), (16, 1307165), (20, 1045732), (40, 522866), (80, 261433)]