21051368

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{4937}}^1$

素因数の和:4997

約数の個数: 32

約数和(自身を含む): 43553160

約数和(自身を除く): 22501792

約数列:

[1, 2, 4, 8, 13, 26, 41, 52, 82, 104, 164, 328, 533, 1066, 2132, 4264, 4937, 9874, 19748, 39496, 64181, 128362, 202417, 256724, 404834, 513448, 809668, 1619336, 2631421, 5262842, 10525684, 21051368]

約数ペア:

[(1, 21051368), (2, 10525684), (4, 5262842), (8, 2631421), (13, 1619336), (26, 809668), (41, 513448), (52, 404834), (82, 256724), (104, 202417), (164, 128362), (328, 64181), (533, 39496), (1066, 19748), (2132, 9874), (4264, 4937)]