28287380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11689}}^1$

素因数の和:11720

約数の個数: 36

約数和(自身を含む): 65300340

約数和(自身を除く): 37012960

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 11689, 23378, 46756, 58445, 116890, 128579, 233780, 257158, 514316, 642895, 1285790, 1414369, 2571580, 2828738, 5657476, 7071845, 14143690, 28287380]

約数ペア:

[(1, 28287380), (2, 14143690), (4, 7071845), (5, 5657476), (10, 2828738), (11, 2571580), (20, 1414369), (22, 1285790), (44, 642895), (55, 514316), (110, 257158), (121, 233780), (220, 128579), (242, 116890), (484, 58445), (605, 46756), (1210, 23378), (2420, 11689)]