81010520

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{20879}}^1$

素因数の和:20987

約数の個数: 32

約数和(自身を含む): 184161600

約数和(自身を除く): 103151080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 20879, 41758, 83516, 104395, 167032, 208790, 417580, 835160, 2025263, 4050526, 8101052, 10126315, 16202104, 20252630, 40505260, 81010520]

約数ペア:

[(1, 81010520), (2, 40505260), (4, 20252630), (5, 16202104), (8, 10126315), (10, 8101052), (20, 4050526), (40, 2025263), (97, 835160), (194, 417580), (388, 208790), (485, 167032), (776, 104395), (970, 83516), (1940, 41758), (3880, 20879)]