21999015

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11369}}^1$

素因数の和:11423

約数の個数: 24

約数和(自身を含む): 39021840

約数和(自身を除く): 17022825

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 11369, 34107, 56845, 102321, 170535, 488867, 511605, 1466601, 2444335, 4399803, 7333005, 21999015]

約数ペア:

[(1, 21999015), (3, 7333005), (5, 4399803), (9, 2444335), (15, 1466601), (43, 511605), (45, 488867), (129, 170535), (215, 102321), (387, 56845), (645, 34107), (1935, 11369)]