78282400

素因数分解:

$2^5\times 5^2\times 7^2\times {\mathrm{1997}}^1$

素因数の和:2031

約数の個数: 108

約数和(自身を含む): 222419358

約数和(自身を除く): 144136958

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 140, 160, 175, 196, 200, 224, 245, 280, 350, 392, 400, 490, 560, 700, 784, 800, 980, 1120, 1225, 1400, 1568, 1960, 1997, 2450, 2800, 3920, 3994, 4900, 5600, 7840, 7988, 9800, 9985, 13979, 15976, 19600, 19970, 27958, 31952, 39200, 39940, 49925, 55916, 63904, 69895, 79880, 97853, 99850, 111832, 139790, 159760, 195706, 199700, 223664, 279580, 319520, 349475, 391412, 399400, 447328, 489265, 559160, 698950, 782824, 798800, 978530, 1118320, 1397900, 1565648, 1597600, 1957060, 2236640, 2446325, 2795800, 3131296, 3914120, 4892650, 5591600, 7828240, 9785300, 11183200, 15656480, 19570600, 39141200, 78282400]

約数ペア:

[(1, 78282400), (2, 39141200), (4, 19570600), (5, 15656480), (7, 11183200), (8, 9785300), (10, 7828240), (14, 5591600), (16, 4892650), (20, 3914120), (25, 3131296), (28, 2795800), (32, 2446325), (35, 2236640), (40, 1957060), (49, 1597600), (50, 1565648), (56, 1397900), (70, 1118320), (80, 978530), (98, 798800), (100, 782824), (112, 698950), (140, 559160), (160, 489265), (175, 447328), (196, 399400), (200, 391412), (224, 349475), (245, 319520), (280, 279580), (350, 223664), (392, 199700), (400, 195706), (490, 159760), (560, 139790), (700, 111832), (784, 99850), (800, 97853), (980, 79880), (1120, 69895), (1225, 63904), (1400, 55916), (1568, 49925), (1960, 39940), (1997, 39200), (2450, 31952), (2800, 27958), (3920, 19970), (3994, 19600), (4900, 15976), (5600, 13979), (7840, 9985), (7988, 9800)]