21356840

素因数分解:

$2^3\times 5^1\times {\mathrm{533921}}^1$

素因数の和:533932

約数の個数: 16

約数和(自身を含む): 48052980

約数和(自身を除く): 26696140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 533921, 1067842, 2135684, 2669605, 4271368, 5339210, 10678420, 21356840]

約数ペア:

[(1, 21356840), (2, 10678420), (4, 5339210), (5, 4271368), (8, 2669605), (10, 2135684), (20, 1067842), (40, 533921)]