20172955

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{431}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 8193893

約数列:

[1, 5, 11, 23, 37, 55, 115, 185, 253, 407, 431, 851, 1265, 2035, 2155, 4255, 4741, 9361, 9913, 15947, 23705, 46805, 49565, 79735, 109043, 175417, 366781, 545215, 877085, 1833905, 4034591, 20172955]

約数ペア:

[(1, 20172955), (5, 4034591), (11, 1833905), (23, 877085), (37, 545215), (55, 366781), (115, 175417), (185, 109043), (253, 79735), (407, 49565), (431, 46805), (851, 23705), (1265, 15947), (2035, 9913), (2155, 9361), (4255, 4741)]