21749885

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^2$

素因数の和:221

約数の個数: 24

約数和(自身を含む): 28672056

約数和(自身を除く): 6922171

約数列:

[1, 5, 17, 41, 79, 85, 205, 395, 697, 1343, 3239, 3485, 6241, 6715, 16195, 31205, 55063, 106097, 255881, 275315, 530485, 1279405, 4349977, 21749885]

約数ペア:

[(1, 21749885), (5, 4349977), (17, 1279405), (41, 530485), (79, 275315), (85, 255881), (205, 106097), (395, 55063), (697, 31205), (1343, 16195), (3239, 6715), (3485, 6241)]