21000404887

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{401}}^1\times {\mathrm{15817}}^1$

素因数の和:16279

約数の個数: 32

約数和(自身を含む): 26859723264

約数和(自身を除く): 5859318377

約数列:

[1, 7, 11, 43, 77, 301, 401, 473, 2807, 3311, 4411, 15817, 17243, 30877, 110719, 120701, 173987, 189673, 680131, 1217909, 1327711, 4760917, 6342617, 7481441, 44398319, 52370087, 69768787, 272732531, 488381509, 1909127717, 3000057841, 21000404887]

約数ペア:

[(1, 21000404887), (7, 3000057841), (11, 1909127717), (43, 488381509), (77, 272732531), (301, 69768787), (401, 52370087), (473, 44398319), (2807, 7481441), (3311, 6342617), (4411, 4760917), (15817, 1327711), (17243, 1217909), (30877, 680131), (110719, 189673), (120701, 173987)]