638945720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{37409}}^1$

素因数の和:37488

約数の個数: 64

約数和(自身を含む): 1669982400

約数和(自身を除く): 1031036680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1708, 2135, 2440, 3416, 4270, 8540, 17080, 37409, 74818, 149636, 187045, 261863, 299272, 374090, 523726, 748180, 1047452, 1309315, 1496360, 2094904, 2281949, 2618630, 4563898, 5237260, 9127796, 10474520, 11409745, 15973643, 18255592, 22819490, 31947286, 45638980, 63894572, 79868215, 91277960, 127789144, 159736430, 319472860, 638945720]

約数ペア:

[(1, 638945720), (2, 319472860), (4, 159736430), (5, 127789144), (7, 91277960), (8, 79868215), (10, 63894572), (14, 45638980), (20, 31947286), (28, 22819490), (35, 18255592), (40, 15973643), (56, 11409745), (61, 10474520), (70, 9127796), (122, 5237260), (140, 4563898), (244, 2618630), (280, 2281949), (305, 2094904), (427, 1496360), (488, 1309315), (610, 1047452), (854, 748180), (1220, 523726), (1708, 374090), (2135, 299272), (2440, 261863), (3416, 187045), (4270, 149636), (8540, 74818), (17080, 37409)]