19489220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10949}}^1$

素因数の和:11047

約数の個数: 24

約数和(自身を含む): 41391000

約数和(自身を除く): 21901780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10949, 21898, 43796, 54745, 109490, 218980, 974461, 1948922, 3897844, 4872305, 9744610, 19489220]

約数ペア:

[(1, 19489220), (2, 9744610), (4, 4872305), (5, 3897844), (10, 1948922), (20, 974461), (89, 218980), (178, 109490), (356, 54745), (445, 43796), (890, 21898), (1780, 10949)]