21238860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{479}}^1\times {\mathrm{739}}^1$

素因数の和:1230

約数の個数: 48

約数和(自身を含む): 59673600

約数和(自身を除く): 38434740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 479, 739, 958, 1437, 1478, 1916, 2217, 2395, 2874, 2956, 3695, 4434, 4790, 5748, 7185, 7390, 8868, 9580, 11085, 14370, 14780, 22170, 28740, 44340, 353981, 707962, 1061943, 1415924, 1769905, 2123886, 3539810, 4247772, 5309715, 7079620, 10619430, 21238860]

約数ペア:

[(1, 21238860), (2, 10619430), (3, 7079620), (4, 5309715), (5, 4247772), (6, 3539810), (10, 2123886), (12, 1769905), (15, 1415924), (20, 1061943), (30, 707962), (60, 353981), (479, 44340), (739, 28740), (958, 22170), (1437, 14780), (1478, 14370), (1916, 11085), (2217, 9580), (2395, 8868), (2874, 7390), (2956, 7185), (3695, 5748), (4434, 4790)]