81904040

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{25919}}^1$

素因数の和:26009

約数の個数: 32

約数和(自身を含む): 186624000

約数和(自身を除く): 104719960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 25919, 51838, 103676, 129595, 207352, 259190, 518380, 1036760, 2047601, 4095202, 8190404, 10238005, 16380808, 20476010, 40952020, 81904040]

約数ペア:

[(1, 81904040), (2, 40952020), (4, 20476010), (5, 16380808), (8, 10238005), (10, 8190404), (20, 4095202), (40, 2047601), (79, 1036760), (158, 518380), (316, 259190), (395, 207352), (632, 129595), (790, 103676), (1580, 51838), (3160, 25919)]