21917540

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{2153}}^1$

素因数の和:2671

約数の個数: 24

約数和(自身を含む): 46138680

約数和(自身を除く): 24221140

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 2036, 2153, 2545, 4306, 5090, 8612, 10180, 10765, 21530, 43060, 1095877, 2191754, 4383508, 5479385, 10958770, 21917540]

約数ペア:

[(1, 21917540), (2, 10958770), (4, 5479385), (5, 4383508), (10, 2191754), (20, 1095877), (509, 43060), (1018, 21530), (2036, 10765), (2153, 10180), (2545, 8612), (4306, 5090)]