21359212

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 44815680

約数和(自身を除く): 23456468

約数列:

[1, 2, 4, 7, 14, 28, 37, 53, 74, 106, 148, 212, 259, 371, 389, 518, 742, 778, 1036, 1484, 1556, 1961, 2723, 3922, 5446, 7844, 10892, 13727, 14393, 20617, 27454, 28786, 41234, 54908, 57572, 82468, 100751, 144319, 201502, 288638, 403004, 577276, 762829, 1525658, 3051316, 5339803, 10679606, 21359212]

約数ペア:

[(1, 21359212), (2, 10679606), (4, 5339803), (7, 3051316), (14, 1525658), (28, 762829), (37, 577276), (53, 403004), (74, 288638), (106, 201502), (148, 144319), (212, 100751), (259, 82468), (371, 57572), (389, 54908), (518, 41234), (742, 28786), (778, 27454), (1036, 20617), (1484, 14393), (1556, 13727), (1961, 10892), (2723, 7844), (3922, 5446)]