21085988

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{307}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 46362624

約数和(自身を除く): 25276636

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 223, 307, 308, 446, 614, 892, 1228, 1561, 2149, 2453, 3122, 3377, 4298, 4906, 6244, 6754, 8596, 9812, 13508, 17171, 23639, 34342, 47278, 68461, 68684, 94556, 136922, 273844, 479227, 753071, 958454, 1506142, 1916908, 3012284, 5271497, 10542994, 21085988]

約数ペア:

[(1, 21085988), (2, 10542994), (4, 5271497), (7, 3012284), (11, 1916908), (14, 1506142), (22, 958454), (28, 753071), (44, 479227), (77, 273844), (154, 136922), (223, 94556), (307, 68684), (308, 68461), (446, 47278), (614, 34342), (892, 23639), (1228, 17171), (1561, 13508), (2149, 9812), (2453, 8596), (3122, 6754), (3377, 6244), (4298, 4906)]