21047416

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{439}}^1\times {\mathrm{461}}^1$

素因数の和:919

約数の個数: 32

約数和(自身を含む): 42688800

約数和(自身を除く): 21641384

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 439, 461, 878, 922, 1756, 1844, 3512, 3688, 5707, 5993, 11414, 11986, 22828, 23972, 45656, 47944, 202379, 404758, 809516, 1619032, 2630927, 5261854, 10523708, 21047416]

約数ペア:

[(1, 21047416), (2, 10523708), (4, 5261854), (8, 2630927), (13, 1619032), (26, 809516), (52, 404758), (104, 202379), (439, 47944), (461, 45656), (878, 23972), (922, 22828), (1756, 11986), (1844, 11414), (3512, 5993), (3688, 5707)]