21238455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{2437}}^1$

素因数の和:2535

約数の個数: 32

約数和(自身を含む): 39320064

約数和(自身を除く): 18081609

約数列:

[1, 3, 5, 7, 15, 21, 35, 83, 105, 249, 415, 581, 1245, 1743, 2437, 2905, 7311, 8715, 12185, 17059, 36555, 51177, 85295, 202271, 255885, 606813, 1011355, 1415897, 3034065, 4247691, 7079485, 21238455]

約数ペア:

[(1, 21238455), (3, 7079485), (5, 4247691), (7, 3034065), (15, 1415897), (21, 1011355), (35, 606813), (83, 255885), (105, 202271), (249, 85295), (415, 51177), (581, 36555), (1245, 17059), (1743, 12185), (2437, 8715), (2905, 7311)]