21147969

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{563}}^1\times {\mathrm{659}}^1$

素因数の和:1244

約数の個数: 16

約数和(自身を含む): 29779200

約数和(自身を除く): 8631231

約数列:

[1, 3, 19, 57, 563, 659, 1689, 1977, 10697, 12521, 32091, 37563, 371017, 1113051, 7049323, 21147969]

約数ペア:

[(1, 21147969), (3, 7049323), (19, 1113051), (57, 371017), (563, 37563), (659, 32091), (1689, 12521), (1977, 10697)]