21990212

素因数分解:

$2^2\times {\mathrm{107}}^1\times {\mathrm{191}}^1\times {\mathrm{269}}^1$

素因数の和:571

約数の個数: 24

約数和(自身を含む): 39191040

約数和(自身を除く): 17200828

約数列:

[1, 2, 4, 107, 191, 214, 269, 382, 428, 538, 764, 1076, 20437, 28783, 40874, 51379, 57566, 81748, 102758, 115132, 205516, 5497553, 10995106, 21990212]

約数ペア:

[(1, 21990212), (2, 10995106), (4, 5497553), (107, 205516), (191, 115132), (214, 102758), (269, 81748), (382, 57566), (428, 51379), (538, 40874), (764, 28783), (1076, 20437)]