81751280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78607}}^1$

素因数の和:78633

約数の個数: 40

約数和(自身を含む): 204695232

約数和(自身を除く): 122943952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78607, 157214, 314428, 393035, 628856, 786070, 1021891, 1257712, 1572140, 2043782, 3144280, 4087564, 5109455, 6288560, 8175128, 10218910, 16350256, 20437820, 40875640, 81751280]

約数ペア:

[(1, 81751280), (2, 40875640), (4, 20437820), (5, 16350256), (8, 10218910), (10, 8175128), (13, 6288560), (16, 5109455), (20, 4087564), (26, 3144280), (40, 2043782), (52, 1572140), (65, 1257712), (80, 1021891), (104, 786070), (130, 628856), (208, 393035), (260, 314428), (520, 157214), (1040, 78607)]