21083787

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{563}}^1$

素因数の和:664

約数の個数: 32

約数和(自身を含む): 33388800

約数和(自身を除く): 12305013

約数列:

[1, 3, 9, 19, 27, 57, 73, 171, 219, 513, 563, 657, 1387, 1689, 1971, 4161, 5067, 10697, 12483, 15201, 32091, 37449, 41099, 96273, 123297, 288819, 369891, 780881, 1109673, 2342643, 7027929, 21083787]

約数ペア:

[(1, 21083787), (3, 7027929), (9, 2342643), (19, 1109673), (27, 780881), (57, 369891), (73, 288819), (171, 123297), (219, 96273), (513, 41099), (563, 37449), (657, 32091), (1387, 15201), (1689, 12483), (1971, 10697), (4161, 5067)]