21145960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:307

約数の個数: 96

約数和(自身を含む): 55588680

約数和(自身を除く): 34442720

約数列:

[1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 44, 55, 68, 85, 88, 110, 121, 136, 170, 187, 220, 242, 257, 340, 374, 440, 484, 514, 605, 680, 748, 935, 968, 1028, 1210, 1285, 1496, 1870, 2056, 2057, 2420, 2570, 2827, 3740, 4114, 4369, 4840, 5140, 5654, 7480, 8228, 8738, 10280, 10285, 11308, 14135, 16456, 17476, 20570, 21845, 22616, 28270, 31097, 34952, 41140, 43690, 48059, 56540, 62194, 82280, 87380, 96118, 113080, 124388, 155485, 174760, 192236, 240295, 248776, 310970, 384472, 480590, 528649, 621940, 961180, 1057298, 1243880, 1922360, 2114596, 2643245, 4229192, 5286490, 10572980, 21145960]

約数ペア:

[(1, 21145960), (2, 10572980), (4, 5286490), (5, 4229192), (8, 2643245), (10, 2114596), (11, 1922360), (17, 1243880), (20, 1057298), (22, 961180), (34, 621940), (40, 528649), (44, 480590), (55, 384472), (68, 310970), (85, 248776), (88, 240295), (110, 192236), (121, 174760), (136, 155485), (170, 124388), (187, 113080), (220, 96118), (242, 87380), (257, 82280), (340, 62194), (374, 56540), (440, 48059), (484, 43690), (514, 41140), (605, 34952), (680, 31097), (748, 28270), (935, 22616), (968, 21845), (1028, 20570), (1210, 17476), (1285, 16456), (1496, 14135), (1870, 11308), (2056, 10285), (2057, 10280), (2420, 8738), (2570, 8228), (2827, 7480), (3740, 5654), (4114, 5140), (4369, 4840)]