21874390

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30809}}^1$

素因数の和:30887

約数の個数: 16

約数和(自身を含む): 39929760

約数和(自身を除く): 18055370

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30809, 61618, 154045, 308090, 2187439, 4374878, 10937195, 21874390]

約数ペア:

[(1, 21874390), (2, 10937195), (5, 4374878), (10, 2187439), (71, 308090), (142, 154045), (355, 61618), (710, 30809)]