20900838

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 49876992

約数和(自身を除く): 28976154

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 43, 71, 86, 129, 142, 163, 213, 258, 301, 326, 426, 489, 497, 602, 903, 978, 994, 1141, 1491, 1806, 2282, 2982, 3053, 3423, 6106, 6846, 7009, 9159, 11573, 14018, 18318, 21027, 21371, 23146, 34719, 42054, 42742, 49063, 64113, 69438, 81011, 98126, 128226, 147189, 162022, 243033, 294378, 486066, 497639, 995278, 1492917, 2985834, 3483473, 6966946, 10450419, 20900838]

約数ペア:

[(1, 20900838), (2, 10450419), (3, 6966946), (6, 3483473), (7, 2985834), (14, 1492917), (21, 995278), (42, 497639), (43, 486066), (71, 294378), (86, 243033), (129, 162022), (142, 147189), (163, 128226), (213, 98126), (258, 81011), (301, 69438), (326, 64113), (426, 49063), (489, 42742), (497, 42054), (602, 34719), (903, 23146), (978, 21371), (994, 21027), (1141, 18318), (1491, 14018), (1806, 11573), (2282, 9159), (2982, 7009), (3053, 6846), (3423, 6106)]