21909355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:303

約数の個数: 32

約数和(自身を含む): 29937600

約数和(自身を除く): 8028245

約数列:

[1, 5, 13, 29, 59, 65, 145, 197, 295, 377, 767, 985, 1711, 1885, 2561, 3835, 5713, 8555, 11623, 12805, 22243, 28565, 58115, 74269, 111215, 151099, 337067, 371345, 755495, 1685335, 4381871, 21909355]

約数ペア:

[(1, 21909355), (5, 4381871), (13, 1685335), (29, 755495), (59, 371345), (65, 337067), (145, 151099), (197, 111215), (295, 74269), (377, 58115), (767, 28565), (985, 22243), (1711, 12805), (1885, 11623), (2561, 8555), (3835, 5713)]