278879770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{19681}}^1$

素因数の和:19810

約数の個数: 32

約数和(自身を含む): 545585040

約数和(自身を除く): 266705270

約数列:

[1, 2, 5, 10, 13, 26, 65, 109, 130, 218, 545, 1090, 1417, 2834, 7085, 14170, 19681, 39362, 98405, 196810, 255853, 511706, 1279265, 2145229, 2558530, 4290458, 10726145, 21452290, 27887977, 55775954, 139439885, 278879770]

約数ペア:

[(1, 278879770), (2, 139439885), (5, 55775954), (10, 27887977), (13, 21452290), (26, 10726145), (65, 4290458), (109, 2558530), (130, 2145229), (218, 1279265), (545, 511706), (1090, 255853), (1417, 196810), (2834, 98405), (7085, 39362), (14170, 19681)]