81209600

素因数分解:

$2^8\times 5^2\times {\mathrm{12689}}^1$

素因数の和:12715

約数の個数: 54

約数和(自身を含む): 201022290

約数和(自身を除く): 119812690

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200, 6400, 12689, 25378, 50756, 63445, 101512, 126890, 203024, 253780, 317225, 406048, 507560, 634450, 812096, 1015120, 1268900, 1624192, 2030240, 2537800, 3248384, 4060480, 5075600, 8120960, 10151200, 16241920, 20302400, 40604800, 81209600]

約数ペア:

[(1, 81209600), (2, 40604800), (4, 20302400), (5, 16241920), (8, 10151200), (10, 8120960), (16, 5075600), (20, 4060480), (25, 3248384), (32, 2537800), (40, 2030240), (50, 1624192), (64, 1268900), (80, 1015120), (100, 812096), (128, 634450), (160, 507560), (200, 406048), (256, 317225), (320, 253780), (400, 203024), (640, 126890), (800, 101512), (1280, 63445), (1600, 50756), (3200, 25378), (6400, 12689)]