640637907

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{577}}^1$

素因数の和:697

約数の個数: 64

約数和(自身を含む): 1087564800

約数和(自身を除く): 446926893

約数列:

[1, 3, 7, 13, 21, 39, 49, 83, 91, 147, 249, 273, 343, 577, 581, 637, 1029, 1079, 1731, 1743, 1911, 3237, 4039, 4067, 4459, 7501, 7553, 12117, 12201, 13377, 22503, 22659, 28273, 28469, 47891, 52507, 52871, 84819, 85407, 143673, 157521, 158613, 197911, 335237, 367549, 370097, 593733, 622583, 1005711, 1102647, 1110291, 1867749, 2346659, 2572843, 4358081, 7039977, 7718529, 13074243, 16426613, 30506567, 49279839, 91519701, 213545969, 640637907]

約数ペア:

[(1, 640637907), (3, 213545969), (7, 91519701), (13, 49279839), (21, 30506567), (39, 16426613), (49, 13074243), (83, 7718529), (91, 7039977), (147, 4358081), (249, 2572843), (273, 2346659), (343, 1867749), (577, 1110291), (581, 1102647), (637, 1005711), (1029, 622583), (1079, 593733), (1731, 370097), (1743, 367549), (1911, 335237), (3237, 197911), (4039, 158613), (4067, 157521), (4459, 143673), (7501, 85407), (7553, 84819), (12117, 52871), (12201, 52507), (13377, 47891), (22503, 28469), (22659, 28273)]