19998728

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{383}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 38568960

約数和(自身を除く): 18570232

約数列:

[1, 2, 4, 8, 61, 107, 122, 214, 244, 383, 428, 488, 766, 856, 1532, 3064, 6527, 13054, 23363, 26108, 40981, 46726, 52216, 81962, 93452, 163924, 186904, 327848, 2499841, 4999682, 9999364, 19998728]

約数ペア:

[(1, 19998728), (2, 9999364), (4, 4999682), (8, 2499841), (61, 327848), (107, 186904), (122, 163924), (214, 93452), (244, 81962), (383, 52216), (428, 46726), (488, 40981), (766, 26108), (856, 23363), (1532, 13054), (3064, 6527)]