21017841

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 31460352

約数和(自身を除く): 10442511

約数列:

[1, 3, 13, 39, 43, 83, 129, 151, 249, 453, 559, 1079, 1677, 1963, 3237, 3569, 5889, 6493, 10707, 12533, 19479, 37599, 46397, 84409, 139191, 162929, 253227, 488787, 538919, 1616757, 7005947, 21017841]

約数ペア:

[(1, 21017841), (3, 7005947), (13, 1616757), (39, 538919), (43, 488787), (83, 253227), (129, 162929), (151, 139191), (249, 84409), (453, 46397), (559, 37599), (1079, 19479), (1677, 12533), (1963, 10707), (3237, 6493), (3569, 5889)]