21745737

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{29}}^2$

素因数の和:107

約数の個数: 54

約数和(自身を含む): 37297962

約数和(自身を除く): 15552225

約数列:

[1, 3, 9, 13, 17, 29, 39, 51, 87, 117, 153, 169, 221, 261, 377, 493, 507, 663, 841, 1131, 1479, 1521, 1989, 2523, 2873, 3393, 4437, 4901, 6409, 7569, 8619, 10933, 14297, 14703, 19227, 25857, 32799, 42891, 44109, 57681, 83317, 98397, 128673, 142129, 185861, 249951, 426387, 557583, 749853, 1279161, 1672749, 2416193, 7248579, 21745737]

約数ペア:

[(1, 21745737), (3, 7248579), (9, 2416193), (13, 1672749), (17, 1279161), (29, 749853), (39, 557583), (51, 426387), (87, 249951), (117, 185861), (153, 142129), (169, 128673), (221, 98397), (261, 83317), (377, 57681), (493, 44109), (507, 42891), (663, 32799), (841, 25857), (1131, 19227), (1479, 14703), (1521, 14297), (1989, 10933), (2523, 8619), (2873, 7569), (3393, 6409), (4437, 4901)]