21430689

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7673}}^1$

素因数の和:7709

約数の個数: 24

約数和(自身を含む): 34993440

約数和(自身を除く): 13562751

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7673, 23019, 53711, 145787, 161133, 375977, 437361, 1020509, 1127931, 3061527, 7143563, 21430689]

約数ペア:

[(1, 21430689), (3, 7143563), (7, 3061527), (19, 1127931), (21, 1020509), (49, 437361), (57, 375977), (133, 161133), (147, 145787), (399, 53711), (931, 23019), (2793, 7673)]