18781256

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{431}}^1$

素因数の和:869

約数の個数: 32

約数和(自身を含む): 38102400

約数和(自身を除く): 19321144

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 419, 431, 838, 862, 1676, 1724, 3352, 3448, 5447, 5603, 10894, 11206, 21788, 22412, 43576, 44824, 180589, 361178, 722356, 1444712, 2347657, 4695314, 9390628, 18781256]

約数ペア:

[(1, 18781256), (2, 9390628), (4, 4695314), (8, 2347657), (13, 1444712), (26, 722356), (52, 361178), (104, 180589), (419, 44824), (431, 43576), (838, 22412), (862, 21788), (1676, 11206), (1724, 10894), (3352, 5603), (3448, 5447)]