21591927

素因数分解:

$3^4\times 7^1\times {\mathrm{113}}^1\times {\mathrm{337}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 37298976

約数和(自身を除く): 15707049

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 113, 189, 337, 339, 567, 791, 1011, 1017, 2359, 2373, 3033, 3051, 7077, 7119, 9099, 9153, 21231, 21357, 27297, 38081, 63693, 64071, 114243, 191079, 266567, 342729, 799701, 1028187, 2399103, 3084561, 7197309, 21591927]

約数ペア:

[(1, 21591927), (3, 7197309), (7, 3084561), (9, 2399103), (21, 1028187), (27, 799701), (63, 342729), (81, 266567), (113, 191079), (189, 114243), (337, 64071), (339, 63693), (567, 38081), (791, 27297), (1011, 21357), (1017, 21231), (2359, 9153), (2373, 9099), (3033, 7119), (3051, 7077)]