81217240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{499}}^1$

素因数の和:836

約数の個数: 64

約数和(自身を含む): 197820000

約数和(自身を除く): 116602760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 313, 499, 520, 626, 998, 1252, 1565, 1996, 2495, 2504, 3130, 3992, 4069, 4990, 6260, 6487, 8138, 9980, 12520, 12974, 16276, 19960, 20345, 25948, 32435, 32552, 40690, 51896, 64870, 81380, 129740, 156187, 162760, 259480, 312374, 624748, 780935, 1249496, 1561870, 2030431, 3123740, 4060862, 6247480, 8121724, 10152155, 16243448, 20304310, 40608620, 81217240]

約数ペア:

[(1, 81217240), (2, 40608620), (4, 20304310), (5, 16243448), (8, 10152155), (10, 8121724), (13, 6247480), (20, 4060862), (26, 3123740), (40, 2030431), (52, 1561870), (65, 1249496), (104, 780935), (130, 624748), (260, 312374), (313, 259480), (499, 162760), (520, 156187), (626, 129740), (998, 81380), (1252, 64870), (1565, 51896), (1996, 40690), (2495, 32552), (2504, 32435), (3130, 25948), (3992, 20345), (4069, 19960), (4990, 16276), (6260, 12974), (6487, 12520), (8138, 9980)]