20345455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{439}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 8039825

約数列:

[1, 5, 13, 23, 31, 65, 115, 155, 299, 403, 439, 713, 1495, 2015, 2195, 3565, 5707, 9269, 10097, 13609, 28535, 46345, 50485, 68045, 131261, 176917, 313007, 656305, 884585, 1565035, 4069091, 20345455]

約数ペア:

[(1, 20345455), (5, 4069091), (13, 1565035), (23, 884585), (31, 656305), (65, 313007), (115, 176917), (155, 131261), (299, 68045), (403, 50485), (439, 46345), (713, 28535), (1495, 13609), (2015, 10097), (2195, 9269), (3565, 5707)]