21808683

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:313

約数の個数: 40

約数和(自身を含む): 35574000

約数和(自身を除く): 13765317

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 139, 149, 351, 417, 447, 1053, 1251, 1341, 1807, 1937, 3753, 4023, 5421, 5811, 11259, 12069, 16263, 17433, 20711, 48789, 52299, 62133, 146367, 156897, 186399, 269243, 559197, 807729, 1677591, 2423187, 7269561, 21808683]

約数ペア:

[(1, 21808683), (3, 7269561), (9, 2423187), (13, 1677591), (27, 807729), (39, 559197), (81, 269243), (117, 186399), (139, 156897), (149, 146367), (351, 62133), (417, 52299), (447, 48789), (1053, 20711), (1251, 17433), (1341, 16263), (1807, 12069), (1937, 11259), (3753, 5811), (4023, 5421)]