21664460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{63719}}^1$

素因数の和:63745

約数の個数: 24

約数和(自身を含む): 48172320

約数和(自身を除く): 26507860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 63719, 127438, 254876, 318595, 637190, 1083223, 1274380, 2166446, 4332892, 5416115, 10832230, 21664460]

約数ペア:

[(1, 21664460), (2, 10832230), (4, 5416115), (5, 4332892), (10, 2166446), (17, 1274380), (20, 1083223), (34, 637190), (68, 318595), (85, 254876), (170, 127438), (340, 63719)]