21338216

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1777}}^1$

素因数の和:1881

約数の個数: 32

約数和(自身を含む): 42672000

約数和(自身を除く): 21333784

約数列:

[1, 2, 4, 8, 19, 38, 76, 79, 152, 158, 316, 632, 1501, 1777, 3002, 3554, 6004, 7108, 12008, 14216, 33763, 67526, 135052, 140383, 270104, 280766, 561532, 1123064, 2667277, 5334554, 10669108, 21338216]

約数ペア:

[(1, 21338216), (2, 10669108), (4, 5334554), (8, 2667277), (19, 1123064), (38, 561532), (76, 280766), (79, 270104), (152, 140383), (158, 135052), (316, 67526), (632, 33763), (1501, 14216), (1777, 12008), (3002, 7108), (3554, 6004)]