21660880

素因数分解:

$2^4\times 5^1\times {\mathrm{270761}}^1$

素因数の和:270774

約数の個数: 20

約数和(自身を含む): 50361732

約数和(自身を除く): 28700852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270761, 541522, 1083044, 1353805, 2166088, 2707610, 4332176, 5415220, 10830440, 21660880]

約数ペア:

[(1, 21660880), (2, 10830440), (4, 5415220), (5, 4332176), (8, 2707610), (10, 2166088), (16, 1353805), (20, 1083044), (40, 541522), (80, 270761)]