21390628

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{7417}}^1$

素因数の和:7531

約数の個数: 24

約数和(自身を含む): 43202432

約数和(自身を除く): 21811804

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 412, 721, 1442, 2884, 7417, 14834, 29668, 51919, 103838, 207676, 763951, 1527902, 3055804, 5347657, 10695314, 21390628]

約数ペア:

[(1, 21390628), (2, 10695314), (4, 5347657), (7, 3055804), (14, 1527902), (28, 763951), (103, 207676), (206, 103838), (412, 51919), (721, 29668), (1442, 14834), (2884, 7417)]