20939531039

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{145643}}^1$

素因数の和:145739

約数の個数: 32

約数和(自身を含む): 26845102080

約数和(自身を除く): 5905571041

約数列:

[1, 7, 19, 23, 47, 133, 161, 329, 437, 893, 1081, 3059, 6251, 7567, 20539, 143773, 145643, 1019501, 2767217, 3349789, 6845221, 19370519, 23448523, 47916547, 63645991, 130059199, 157440083, 445521937, 910414393, 1102080581, 2991361577, 20939531039]

約数ペア:

[(1, 20939531039), (7, 2991361577), (19, 1102080581), (23, 910414393), (47, 445521937), (133, 157440083), (161, 130059199), (329, 63645991), (437, 47916547), (893, 23448523), (1081, 19370519), (3059, 6845221), (6251, 3349789), (7567, 2767217), (20539, 1019501), (143773, 145643)]