20640004

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{3527}}^1$

素因数の和:3568

約数の個数: 48

約数和(自身を含む): 47416320

約数和(自身を除く): 26776316

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 76, 77, 133, 154, 209, 266, 308, 418, 532, 836, 1463, 2926, 3527, 5852, 7054, 14108, 24689, 38797, 49378, 67013, 77594, 98756, 134026, 155188, 268052, 271579, 469091, 543158, 737143, 938182, 1086316, 1474286, 1876364, 2948572, 5160001, 10320002, 20640004]

約数ペア:

[(1, 20640004), (2, 10320002), (4, 5160001), (7, 2948572), (11, 1876364), (14, 1474286), (19, 1086316), (22, 938182), (28, 737143), (38, 543158), (44, 469091), (76, 271579), (77, 268052), (133, 155188), (154, 134026), (209, 98756), (266, 77594), (308, 67013), (418, 49378), (532, 38797), (836, 24689), (1463, 14108), (2926, 7054), (3527, 5852)]