21917680

素因数分解:

$2^4\times 5^1\times {\mathrm{273971}}^1$

素因数の和:273984

約数の個数: 20

約数和(自身を含む): 50958792

約数和(自身を除く): 29041112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273971, 547942, 1095884, 1369855, 2191768, 2739710, 4383536, 5479420, 10958840, 21917680]

約数ペア:

[(1, 21917680), (2, 10958840), (4, 5479420), (5, 4383536), (8, 2739710), (10, 2191768), (16, 1369855), (20, 1095884), (40, 547942), (80, 273971)]