21755961

素因数分解:

$3^2\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:425

約数の個数: 24

約数和(自身を含む): 32165640

約数和(自身を除く): 10409679

約数列:

[1, 3, 9, 89, 157, 173, 267, 471, 519, 801, 1413, 1557, 13973, 15397, 27161, 41919, 46191, 81483, 125757, 138573, 244449, 2417329, 7251987, 21755961]

約数ペア:

[(1, 21755961), (3, 7251987), (9, 2417329), (89, 244449), (157, 138573), (173, 125757), (267, 81483), (471, 46191), (519, 41919), (801, 27161), (1413, 15397), (1557, 13973)]