21238646

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:237

約数の個数: 48

約数和(自身を含む): 38833872

約数和(自身を除く): 17595226

約数列:

[1, 2, 11, 13, 22, 26, 43, 86, 121, 143, 157, 242, 286, 314, 473, 559, 946, 1118, 1573, 1727, 2041, 3146, 3454, 4082, 5203, 6149, 6751, 10406, 12298, 13502, 18997, 22451, 37994, 44902, 67639, 74261, 87763, 135278, 148522, 175526, 246961, 493922, 816871, 965393, 1633742, 1930786, 10619323, 21238646]

約数ペア:

[(1, 21238646), (2, 10619323), (11, 1930786), (13, 1633742), (22, 965393), (26, 816871), (43, 493922), (86, 246961), (121, 175526), (143, 148522), (157, 135278), (242, 87763), (286, 74261), (314, 67639), (473, 44902), (559, 37994), (946, 22451), (1118, 18997), (1573, 13502), (1727, 12298), (2041, 10406), (3146, 6751), (3454, 6149), (4082, 5203)]