21979040

素因数分解:

$2^5\times 5^1\times {\mathrm{137369}}^1$

素因数の和:137384

約数の個数: 24

約数和(自身を含む): 51925860

約数和(自身を除く): 29946820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 137369, 274738, 549476, 686845, 1098952, 1373690, 2197904, 2747380, 4395808, 5494760, 10989520, 21979040]

約数ペア:

[(1, 21979040), (2, 10989520), (4, 5494760), (5, 4395808), (8, 2747380), (10, 2197904), (16, 1373690), (20, 1098952), (32, 686845), (40, 549476), (80, 274738), (160, 137369)]