21103180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{491}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 50916096

約数和(自身を除く): 29812916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 307, 491, 614, 982, 1228, 1535, 1964, 2149, 2455, 3070, 3437, 4298, 4910, 6140, 6874, 8596, 9820, 10745, 13748, 17185, 21490, 34370, 42980, 68740, 150737, 301474, 602948, 753685, 1055159, 1507370, 2110318, 3014740, 4220636, 5275795, 10551590, 21103180]

約数ペア:

[(1, 21103180), (2, 10551590), (4, 5275795), (5, 4220636), (7, 3014740), (10, 2110318), (14, 1507370), (20, 1055159), (28, 753685), (35, 602948), (70, 301474), (140, 150737), (307, 68740), (491, 42980), (614, 34370), (982, 21490), (1228, 17185), (1535, 13748), (1964, 10745), (2149, 9820), (2455, 8596), (3070, 6874), (3437, 6140), (4298, 4910)]