81267920

素因数分解:

$2^4\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1321}}^1$

素因数の和:2103

約数の個数: 40

約数和(自身を含む): 189336840

約数和(自身を除く): 108068920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 769, 1321, 1538, 2642, 3076, 3845, 5284, 6152, 6605, 7690, 10568, 12304, 13210, 15380, 21136, 26420, 30760, 52840, 61520, 105680, 1015849, 2031698, 4063396, 5079245, 8126792, 10158490, 16253584, 20316980, 40633960, 81267920]

約数ペア:

[(1, 81267920), (2, 40633960), (4, 20316980), (5, 16253584), (8, 10158490), (10, 8126792), (16, 5079245), (20, 4063396), (40, 2031698), (80, 1015849), (769, 105680), (1321, 61520), (1538, 52840), (2642, 30760), (3076, 26420), (3845, 21136), (5284, 15380), (6152, 13210), (6605, 12304), (7690, 10568)]