19605920

素因数分解:

$2^5\times 5^1\times {\mathrm{181}}^1\times {\mathrm{677}}^1$

素因数の和:873

約数の個数: 48

約数和(自身を含む): 46643688

約数和(自身を除く): 27037768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 181, 362, 677, 724, 905, 1354, 1448, 1810, 2708, 2896, 3385, 3620, 5416, 5792, 6770, 7240, 10832, 13540, 14480, 21664, 27080, 28960, 54160, 108320, 122537, 245074, 490148, 612685, 980296, 1225370, 1960592, 2450740, 3921184, 4901480, 9802960, 19605920]

約数ペア:

[(1, 19605920), (2, 9802960), (4, 4901480), (5, 3921184), (8, 2450740), (10, 1960592), (16, 1225370), (20, 980296), (32, 612685), (40, 490148), (80, 245074), (160, 122537), (181, 108320), (362, 54160), (677, 28960), (724, 27080), (905, 21664), (1354, 14480), (1448, 13540), (1810, 10832), (2708, 7240), (2896, 6770), (3385, 5792), (3620, 5416)]