21026840

素因数分解:

$2^3\times 5^1\times {\mathrm{525671}}^1$

素因数の和:525682

約数の個数: 16

約数和(自身を含む): 47310480

約数和(自身を除く): 26283640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 525671, 1051342, 2102684, 2628355, 4205368, 5256710, 10513420, 21026840]

約数ペア:

[(1, 21026840), (2, 10513420), (4, 5256710), (5, 4205368), (8, 2628355), (10, 2102684), (20, 1051342), (40, 525671)]