21045720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1609}}^1$

素因数の和:1732

約数の個数: 64

約数和(自身を含む): 63756000

約数和(自身を除く): 42710280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 109, 120, 218, 327, 436, 545, 654, 872, 1090, 1308, 1609, 1635, 2180, 2616, 3218, 3270, 4360, 4827, 6436, 6540, 8045, 9654, 12872, 13080, 16090, 19308, 24135, 32180, 38616, 48270, 64360, 96540, 175381, 193080, 350762, 526143, 701524, 876905, 1052286, 1403048, 1753810, 2104572, 2630715, 3507620, 4209144, 5261430, 7015240, 10522860, 21045720]

約数ペア:

[(1, 21045720), (2, 10522860), (3, 7015240), (4, 5261430), (5, 4209144), (6, 3507620), (8, 2630715), (10, 2104572), (12, 1753810), (15, 1403048), (20, 1052286), (24, 876905), (30, 701524), (40, 526143), (60, 350762), (109, 193080), (120, 175381), (218, 96540), (327, 64360), (436, 48270), (545, 38616), (654, 32180), (872, 24135), (1090, 19308), (1308, 16090), (1609, 13080), (1635, 12872), (2180, 9654), (2616, 8045), (3218, 6540), (3270, 6436), (4360, 4827)]