21870260

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7867}}^1$

素因数の和:8015

約数の個数: 24

約数和(自身を含む): 46263840

約数和(自身を除く): 24393580

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7867, 15734, 31468, 39335, 78670, 157340, 1093513, 2187026, 4374052, 5467565, 10935130, 21870260]

約数ペア:

[(1, 21870260), (2, 10935130), (4, 5467565), (5, 4374052), (10, 2187026), (20, 1093513), (139, 157340), (278, 78670), (556, 39335), (695, 31468), (1390, 15734), (2780, 7867)]