21684377

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{347}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 28062720

約数和(自身を除く): 6378343

約数列:

[1, 11, 13, 19, 23, 143, 209, 247, 253, 299, 347, 437, 2717, 3289, 3817, 4511, 4807, 5681, 6593, 7981, 49621, 62491, 72523, 85709, 87791, 103753, 151639, 942799, 1141283, 1668029, 1971307, 21684377]

約数ペア:

[(1, 21684377), (11, 1971307), (13, 1668029), (19, 1141283), (23, 942799), (143, 151639), (209, 103753), (247, 87791), (253, 85709), (299, 72523), (347, 62491), (437, 49621), (2717, 7981), (3289, 6593), (3817, 5681), (4511, 4807)]