20784775

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{6871}}^1$

素因数の和:6903

約数の個数: 18

約数和(自身を含む): 28333256

約数和(自身を除く): 7548481

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 6871, 34355, 75581, 171775, 377905, 831391, 1889525, 4156955, 20784775]

約数ペア:

[(1, 20784775), (5, 4156955), (11, 1889525), (25, 831391), (55, 377905), (121, 171775), (275, 75581), (605, 34355), (3025, 6871)]