20157784

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{269}}^1$

素因数の和:340

約数の個数: 64

約数和(自身を含む): 43740000

約数和(自身を除く): 23582216

約数列:

[1, 2, 4, 8, 17, 19, 29, 34, 38, 58, 68, 76, 116, 136, 152, 232, 269, 323, 493, 538, 551, 646, 986, 1076, 1102, 1292, 1972, 2152, 2204, 2584, 3944, 4408, 4573, 5111, 7801, 9146, 9367, 10222, 15602, 18292, 18734, 20444, 31204, 36584, 37468, 40888, 62408, 74936, 86887, 132617, 148219, 173774, 265234, 296438, 347548, 530468, 592876, 695096, 1060936, 1185752, 2519723, 5039446, 10078892, 20157784]

約数ペア:

[(1, 20157784), (2, 10078892), (4, 5039446), (8, 2519723), (17, 1185752), (19, 1060936), (29, 695096), (34, 592876), (38, 530468), (58, 347548), (68, 296438), (76, 265234), (116, 173774), (136, 148219), (152, 132617), (232, 86887), (269, 74936), (323, 62408), (493, 40888), (538, 37468), (551, 36584), (646, 31204), (986, 20444), (1076, 18734), (1102, 18292), (1292, 15602), (1972, 10222), (2152, 9367), (2204, 9146), (2584, 7801), (3944, 5111), (4408, 4573)]