21325360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{337}}^1$

素因数の和:470

約数の個数: 80

約数和(自身を含む): 57335616

約数和(自身を除く): 36010256

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 113, 140, 226, 280, 337, 452, 560, 565, 674, 791, 904, 1130, 1348, 1582, 1685, 1808, 2260, 2359, 2696, 3164, 3370, 3955, 4520, 4718, 5392, 6328, 6740, 7910, 9040, 9436, 11795, 12656, 13480, 15820, 18872, 23590, 26960, 31640, 37744, 38081, 47180, 63280, 76162, 94360, 152324, 188720, 190405, 266567, 304648, 380810, 533134, 609296, 761620, 1066268, 1332835, 1523240, 2132536, 2665670, 3046480, 4265072, 5331340, 10662680, 21325360]

約数ペア:

[(1, 21325360), (2, 10662680), (4, 5331340), (5, 4265072), (7, 3046480), (8, 2665670), (10, 2132536), (14, 1523240), (16, 1332835), (20, 1066268), (28, 761620), (35, 609296), (40, 533134), (56, 380810), (70, 304648), (80, 266567), (112, 190405), (113, 188720), (140, 152324), (226, 94360), (280, 76162), (337, 63280), (452, 47180), (560, 38081), (565, 37744), (674, 31640), (791, 26960), (904, 23590), (1130, 18872), (1348, 15820), (1582, 13480), (1685, 12656), (1808, 11795), (2260, 9436), (2359, 9040), (2696, 7910), (3164, 6740), (3370, 6328), (3955, 5392), (4520, 4718)]