77890400

素因数分解:

$2^5\times 5^2\times 7^2\times {\mathrm{1987}}^1$

素因数の和:2021

約数の個数: 108

約数和(自身を含む): 221306148

約数和(自身を除く): 143415748

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, 1987, 2450, 2800, 3920, 3974, 4900, 5600, 7840, 7948, 9800, 9935, 13909, 15896, 19600, 19870, 27818, 31792, 39200, 39740, 49675, 55636, 63584, 69545, 79480, 97363, 99350, 111272, 139090, 158960, 194726, 198700, 222544, 278180, 317920, 347725, 389452, 397400, 445088, 486815, 556360, 695450, 778904, 794800, 973630, 1112720, 1390900, 1557808, 1589600, 1947260, 2225440, 2434075, 2781800, 3115616, 3894520, 4868150, 5563600, 7789040, 9736300, 11127200, 15578080, 19472600, 38945200, 77890400]

約数ペア:

[(1, 77890400), (2, 38945200), (4, 19472600), (5, 15578080), (7, 11127200), (8, 9736300), (10, 7789040), (14, 5563600), (16, 4868150), (20, 3894520), (25, 3115616), (28, 2781800), (32, 2434075), (35, 2225440), (40, 1947260), (49, 1589600), (50, 1557808), (56, 1390900), (70, 1112720), (80, 973630), (98, 794800), (100, 778904), (112, 695450), (140, 556360), (160, 486815), (175, 445088), (196, 397400), (200, 389452), (224, 347725), (245, 317920), (280, 278180), (350, 222544), (392, 198700), (400, 194726), (490, 158960), (560, 139090), (700, 111272), (784, 99350), (800, 97363), (980, 79480), (1120, 69545), (1225, 63584), (1400, 55636), (1568, 49675), (1960, 39740), (1987, 39200), (2450, 31792), (2800, 27818), (3920, 19870), (3974, 19600), (4900, 15896), (5600, 13909), (7840, 9935), (7948, 9800)]