21345525

素因数分解:

$3^4\times 5^2\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:232

約数の個数: 60

約数和(自身を含む): 40330752

約数和(自身を除く): 18985227

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 83, 127, 135, 225, 249, 381, 405, 415, 635, 675, 747, 1143, 1245, 1905, 2025, 2075, 2241, 3175, 3429, 3735, 5715, 6225, 6723, 9525, 10287, 10541, 11205, 17145, 18675, 28575, 31623, 33615, 51435, 52705, 56025, 85725, 94869, 158115, 168075, 257175, 263525, 284607, 474345, 790575, 853821, 1423035, 2371725, 4269105, 7115175, 21345525]

約数ペア:

[(1, 21345525), (3, 7115175), (5, 4269105), (9, 2371725), (15, 1423035), (25, 853821), (27, 790575), (45, 474345), (75, 284607), (81, 263525), (83, 257175), (127, 168075), (135, 158115), (225, 94869), (249, 85725), (381, 56025), (405, 52705), (415, 51435), (635, 33615), (675, 31623), (747, 28575), (1143, 18675), (1245, 17145), (1905, 11205), (2025, 10541), (2075, 10287), (2241, 9525), (3175, 6723), (3429, 6225), (3735, 5715)]