21287646

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{16657}}^1$

素因数の和:16736

約数の個数: 24

約数和(自身を含む): 46775664

約数和(自身を除く): 25488018

約数列:

[1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639, 1278, 16657, 33314, 49971, 99942, 149913, 299826, 1182647, 2365294, 3547941, 7095882, 10643823, 21287646]

約数ペア:

[(1, 21287646), (2, 10643823), (3, 7095882), (6, 3547941), (9, 2365294), (18, 1182647), (71, 299826), (142, 149913), (213, 99942), (426, 49971), (639, 33314), (1278, 16657)]