21424240

素因数分解:

$2^4\times 5^1\times {\mathrm{267803}}^1$

素因数の和:267816

約数の個数: 20

約数和(自身を含む): 49811544

約数和(自身を除く): 28387304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 267803, 535606, 1071212, 1339015, 2142424, 2678030, 4284848, 5356060, 10712120, 21424240]

約数ペア:

[(1, 21424240), (2, 10712120), (4, 5356060), (5, 4284848), (8, 2678030), (10, 2142424), (16, 1339015), (20, 1071212), (40, 535606), (80, 267803)]