20575989

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6949}}^1$

素因数の和:7009

約数の個数: 24

約数和(自身を含む): 34694400

約数和(自身を除く): 14118411

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 6949, 20847, 48643, 62541, 145929, 326603, 437787, 979809, 2286221, 2939427, 6858663, 20575989]

約数ペア:

[(1, 20575989), (3, 6858663), (7, 2939427), (9, 2286221), (21, 979809), (47, 437787), (63, 326603), (141, 145929), (329, 62541), (423, 48643), (987, 20847), (2961, 6949)]