20526590

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:441

約数の個数: 48

約数和(自身を含む): 43412112

約数和(自身を除く): 22885522

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 163, 245, 257, 326, 490, 514, 815, 1141, 1285, 1630, 1799, 2282, 2570, 3598, 5705, 7987, 8995, 11410, 12593, 15974, 17990, 25186, 39935, 41891, 62965, 79870, 83782, 125930, 209455, 293237, 418910, 586474, 1466185, 2052659, 2932370, 4105318, 10263295, 20526590]

約数ペア:

[(1, 20526590), (2, 10263295), (5, 4105318), (7, 2932370), (10, 2052659), (14, 1466185), (35, 586474), (49, 418910), (70, 293237), (98, 209455), (163, 125930), (245, 83782), (257, 79870), (326, 62965), (490, 41891), (514, 39935), (815, 25186), (1141, 17990), (1285, 15974), (1630, 12593), (1799, 11410), (2282, 8995), (2570, 7987), (3598, 5705)]