21721359

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1249}}^1$

素因数の和:1311

約数の個数: 32

約数和(自身を含む): 34560000

約数和(自身を除く): 12838641

約数列:

[1, 3, 11, 17, 31, 33, 51, 93, 187, 341, 527, 561, 1023, 1249, 1581, 3747, 5797, 13739, 17391, 21233, 38719, 41217, 63699, 116157, 233563, 425909, 658223, 700689, 1277727, 1974669, 7240453, 21721359]

約数ペア:

[(1, 21721359), (3, 7240453), (11, 1974669), (17, 1277727), (31, 700689), (33, 658223), (51, 425909), (93, 233563), (187, 116157), (341, 63699), (527, 41217), (561, 38719), (1023, 21233), (1249, 17391), (1581, 13739), (3747, 5797)]