21712720

素因数分解:

$2^4\times 5^1\times {\mathrm{271409}}^1$

素因数の和:271422

約数の個数: 20

約数和(自身を含む): 50482260

約数和(自身を除く): 28769540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271409, 542818, 1085636, 1357045, 2171272, 2714090, 4342544, 5428180, 10856360, 21712720]

約数ペア:

[(1, 21712720), (2, 10856360), (4, 5428180), (5, 4342544), (8, 2714090), (10, 2171272), (16, 1357045), (20, 1085636), (40, 542818), (80, 271409)]