18181720

素因数分解:

$2^3\times 5^1\times {\mathrm{454543}}^1$

素因数の和:454554

約数の個数: 16

約数和(自身を含む): 40908960

約数和(自身を除く): 22727240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 454543, 909086, 1818172, 2272715, 3636344, 4545430, 9090860, 18181720]

約数ペア:

[(1, 18181720), (2, 9090860), (4, 4545430), (5, 3636344), (8, 2272715), (10, 1818172), (20, 909086), (40, 454543)]