21274227

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:300

約数の個数: 36

約数和(自身を含む): 33915024

約数和(自身を除く): 12640797

約数列:

[1, 3, 9, 13, 39, 71, 117, 169, 197, 213, 507, 591, 639, 923, 1521, 1773, 2561, 2769, 7683, 8307, 11999, 13987, 23049, 33293, 35997, 41961, 99879, 107991, 125883, 181831, 299637, 545493, 1636479, 2363803, 7091409, 21274227]

約数ペア:

[(1, 21274227), (3, 7091409), (9, 2363803), (13, 1636479), (39, 545493), (71, 299637), (117, 181831), (169, 125883), (197, 107991), (213, 99879), (507, 41961), (591, 35997), (639, 33293), (923, 23049), (1521, 13987), (1773, 11999), (2561, 8307), (2769, 7683)]