21406868

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{20663}}^1$

素因数の和:20711

約数の個数: 24

約数和(自身を含む): 43972992

約数和(自身を除く): 22566124

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 148, 259, 518, 1036, 20663, 41326, 82652, 144641, 289282, 578564, 764531, 1529062, 3058124, 5351717, 10703434, 21406868]

約数ペア:

[(1, 21406868), (2, 10703434), (4, 5351717), (7, 3058124), (14, 1529062), (28, 764531), (37, 578564), (74, 289282), (148, 144641), (259, 82652), (518, 41326), (1036, 20663)]