21438651

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 10736709

約数列:

[1, 3, 13, 37, 39, 83, 111, 179, 249, 481, 537, 1079, 1443, 2327, 3071, 3237, 6623, 6981, 9213, 14857, 19869, 39923, 44571, 86099, 119769, 193141, 258297, 549709, 579423, 1649127, 7146217, 21438651]

約数ペア:

[(1, 21438651), (3, 7146217), (13, 1649127), (37, 579423), (39, 549709), (83, 258297), (111, 193141), (179, 119769), (249, 86099), (481, 44571), (537, 39923), (1079, 19869), (1443, 14857), (2327, 9213), (3071, 6981), (3237, 6623)]