20697680

素因数分解:

$2^4\times 5^1\times {\mathrm{258721}}^1$

素因数の和:258734

約数の個数: 20

約数和(自身を含む): 48122292

約数和(自身を除く): 27424612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258721, 517442, 1034884, 1293605, 2069768, 2587210, 4139536, 5174420, 10348840, 20697680]

約数ペア:

[(1, 20697680), (2, 10348840), (4, 5174420), (5, 4139536), (8, 2587210), (10, 2069768), (16, 1293605), (20, 1034884), (40, 517442), (80, 258721)]