20408186800

素因数分解:

$2^4\times 5^2\times {\mathrm{163}}^1\times {\mathrm{313009}}^1$

素因数の和:313190

約数の個数: 60

約数和(自身を含む): 49331628040

約数和(自身を除く): 28923441240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 163, 200, 326, 400, 652, 815, 1304, 1630, 2608, 3260, 4075, 6520, 8150, 13040, 16300, 32600, 65200, 313009, 626018, 1252036, 1565045, 2504072, 3130090, 5008144, 6260180, 7825225, 12520360, 15650450, 25040720, 31300900, 51020467, 62601800, 102040934, 125203600, 204081868, 255102335, 408163736, 510204670, 816327472, 1020409340, 1275511675, 2040818680, 2551023350, 4081637360, 5102046700, 10204093400, 20408186800]

約数ペア:

[(1, 20408186800), (2, 10204093400), (4, 5102046700), (5, 4081637360), (8, 2551023350), (10, 2040818680), (16, 1275511675), (20, 1020409340), (25, 816327472), (40, 510204670), (50, 408163736), (80, 255102335), (100, 204081868), (163, 125203600), (200, 102040934), (326, 62601800), (400, 51020467), (652, 31300900), (815, 25040720), (1304, 15650450), (1630, 12520360), (2608, 7825225), (3260, 6260180), (4075, 5008144), (6520, 3130090), (8150, 2504072), (13040, 1565045), (16300, 1252036), (32600, 626018), (65200, 313009)]