21988.00000000

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{367}}^1\times {\mathrm{929}}^1$

素因数の和:1310

約数の個数: 32

約数和(自身を含む): 49282560

約数和(自身を除く): 25416550

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 367, 734, 929, 1835, 1858, 2569, 3670, 4645, 5138, 6503, 9290, 12845, 13006, 25690, 32515, 65030, 340943, 681886, 1704715, 2386601, 3409430, 4773202, 11933005, 23866010]

約数ペア:

[(1, 23866010), (2, 11933005), (5, 4773202), (7, 3409430), (10, 2386601), (14, 1704715), (35, 681886), (70, 340943), (367, 65030), (734, 32515), (929, 25690), (1835, 13006), (1858, 12845), (2569, 9290), (3670, 6503), (4645, 5138)]