21250871845

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1152121}}^1$

素因数の和:1152181

約数の個数: 32

約数和(自身を含む): 31853869056

約数和(自身を除く): 10602997211

約数列:

[1, 5, 7, 17, 31, 35, 85, 119, 155, 217, 527, 595, 1085, 2635, 3689, 18445, 1152121, 5760605, 8064847, 19586057, 35715751, 40324235, 97930285, 137102399, 178578755, 250010257, 607167767, 685511995, 1250051285, 3035838835, 4250174369, 21250871845]

約数ペア:

[(1, 21250871845), (5, 4250174369), (7, 3035838835), (17, 1250051285), (31, 685511995), (35, 607167767), (85, 250010257), (119, 178578755), (155, 137102399), (217, 97930285), (527, 40324235), (595, 35715751), (1085, 19586057), (2635, 8064847), (3689, 5760605), (18445, 1152121)]