21795920

素因数分解:

$2^4\times 5^1\times {\mathrm{272449}}^1$

素因数の和:272462

約数の個数: 20

約数和(自身を含む): 50675700

約数和(自身を除く): 28879780

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272449, 544898, 1089796, 1362245, 2179592, 2724490, 4359184, 5448980, 10897960, 21795920]

約数ペア:

[(1, 21795920), (2, 10897960), (4, 5448980), (5, 4359184), (8, 2724490), (10, 2179592), (16, 1362245), (20, 1089796), (40, 544898), (80, 272449)]