21968289

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{15161}}^1$

素因数の和:15197

約数の個数: 24

約数和(自身を含む): 37844352

約数和(自身を除く): 15876063

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 161, 207, 483, 1449, 15161, 45483, 106127, 136449, 318381, 348703, 955143, 1046109, 2440921, 3138327, 7322763, 21968289]

約数ペア:

[(1, 21968289), (3, 7322763), (7, 3138327), (9, 2440921), (21, 1046109), (23, 955143), (63, 348703), (69, 318381), (161, 136449), (207, 106127), (483, 45483), (1449, 15161)]