390400

素因数分解:

$2^8\times 5^2\times {\mathrm{61}}^1$

素因数の和:87

約数の個数: 54

約数和(自身を含む): 982142

約数和(自身を除く): 591742

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 61, 64, 80, 100, 122, 128, 160, 200, 244, 256, 305, 320, 400, 488, 610, 640, 800, 976, 1220, 1280, 1525, 1600, 1952, 2440, 3050, 3200, 3904, 4880, 6100, 6400, 7808, 9760, 12200, 15616, 19520, 24400, 39040, 48800, 78080, 97600, 195200, 390400]

約数ペア:

[(1, 390400), (2, 195200), (4, 97600), (5, 78080), (8, 48800), (10, 39040), (16, 24400), (20, 19520), (25, 15616), (32, 12200), (40, 9760), (50, 7808), (61, 6400), (64, 6100), (80, 4880), (100, 3904), (122, 3200), (128, 3050), (160, 2440), (200, 1952), (244, 1600), (256, 1525), (305, 1280), (320, 1220), (400, 976), (488, 800), (610, 640)]