21215215

素因数分解:

$5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:271

約数の個数: 32

約数和(自身を含む): 30159360

約数和(自身を除く): 8944145

約数列:

[1, 5, 7, 35, 67, 83, 109, 335, 415, 469, 545, 581, 763, 2345, 2905, 3815, 5561, 7303, 9047, 27805, 36515, 38927, 45235, 51121, 63329, 194635, 255605, 316645, 606149, 3030745, 4243043, 21215215]

約数ペア:

[(1, 21215215), (5, 4243043), (7, 3030745), (35, 606149), (67, 316645), (83, 255605), (109, 194635), (335, 63329), (415, 51121), (469, 45235), (545, 38927), (581, 36515), (763, 27805), (2345, 9047), (2905, 7303), (3815, 5561)]