21217833

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3701}}^1$

素因数の和:3734

約数の個数: 36

約数和(自身を含む): 38404548

約数和(自身を除く): 17186715

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3701, 5733, 11103, 25907, 33309, 48113, 77721, 144339, 181349, 233163, 336791, 433017, 544047, 1010373, 1632141, 2357537, 3031119, 7072611, 21217833]

約数ペア:

[(1, 21217833), (3, 7072611), (7, 3031119), (9, 2357537), (13, 1632141), (21, 1010373), (39, 544047), (49, 433017), (63, 336791), (91, 233163), (117, 181349), (147, 144339), (273, 77721), (441, 48113), (637, 33309), (819, 25907), (1911, 11103), (3701, 5733)]