21990243

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{15497}}^1$

素因数の和:15554

約数の個数: 16

約数和(自身を含む): 32731776

約数和(自身を除く): 10741533

約数列:

[1, 3, 11, 33, 43, 129, 473, 1419, 15497, 46491, 170467, 511401, 666371, 1999113, 7330081, 21990243]

約数ペア:

[(1, 21990243), (3, 7330081), (11, 1999113), (33, 666371), (43, 511401), (129, 170467), (473, 46491), (1419, 15497)]