21165921

素因数分解:

$3^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2113}}^1$

素因数の和:2182

約数の個数: 32

約数和(自身を含む): 36529920

約数和(自身を除く): 15363999

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 159, 189, 371, 477, 1113, 1431, 2113, 3339, 6339, 10017, 14791, 19017, 44373, 57051, 111989, 133119, 335967, 399357, 783923, 1007901, 2351769, 3023703, 7055307, 21165921]

約数ペア:

[(1, 21165921), (3, 7055307), (7, 3023703), (9, 2351769), (21, 1007901), (27, 783923), (53, 399357), (63, 335967), (159, 133119), (189, 111989), (371, 57051), (477, 44373), (1113, 19017), (1431, 14791), (2113, 10017), (3339, 6339)]