21469987

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{653}}^1$

素因数の和:739

約数の個数: 24

約数和(自身を含む): 27734832

約数和(自身を除く): 6264845

約数列:

[1, 7, 11, 49, 61, 77, 427, 539, 653, 671, 2989, 4571, 4697, 7183, 31997, 32879, 39833, 50281, 278831, 351967, 438163, 1951817, 3067141, 21469987]

約数ペア:

[(1, 21469987), (7, 3067141), (11, 1951817), (49, 438163), (61, 351967), (77, 278831), (427, 50281), (539, 39833), (653, 32879), (671, 31997), (2989, 7183), (4571, 4697)]