20980408

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{1663}}^1$

素因数の和:1771

約数の個数: 32

約数和(自身を含む): 41932800

約数和(自身を除く): 20952392

約数列:

[1, 2, 4, 8, 19, 38, 76, 83, 152, 166, 332, 664, 1577, 1663, 3154, 3326, 6308, 6652, 12616, 13304, 31597, 63194, 126388, 138029, 252776, 276058, 552116, 1104232, 2622551, 5245102, 10490204, 20980408]

約数ペア:

[(1, 20980408), (2, 10490204), (4, 5245102), (8, 2622551), (19, 1104232), (38, 552116), (76, 276058), (83, 252776), (152, 138029), (166, 126388), (332, 63194), (664, 31597), (1577, 13304), (1663, 12616), (3154, 6652), (3326, 6308)]