21016983

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{251}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 11158377

約数列:

[1, 3, 13, 19, 39, 57, 113, 247, 251, 339, 741, 753, 1469, 2147, 3263, 4407, 4769, 6441, 9789, 14307, 27911, 28363, 61997, 83733, 85089, 185991, 368719, 538897, 1106157, 1616691, 7005661, 21016983]

約数ペア:

[(1, 21016983), (3, 7005661), (13, 1616691), (19, 1106157), (39, 538897), (57, 368719), (113, 185991), (247, 85089), (251, 83733), (339, 61997), (741, 28363), (753, 27911), (1469, 14307), (2147, 9789), (3263, 6441), (4407, 4769)]