21256690

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:152

約数の個数: 96

約数和(自身を含む): 49641984

約数和(自身を除く): 28385294

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 47, 49, 65, 70, 71, 91, 94, 98, 130, 142, 182, 235, 245, 329, 355, 455, 470, 490, 497, 611, 637, 658, 710, 910, 923, 994, 1222, 1274, 1645, 1846, 2303, 2485, 3055, 3185, 3290, 3337, 3479, 4277, 4606, 4615, 4970, 6110, 6370, 6461, 6674, 6958, 8554, 9230, 11515, 12922, 16685, 17395, 21385, 23030, 23359, 29939, 32305, 33370, 34790, 42770, 43381, 45227, 46718, 59878, 64610, 86762, 90454, 116795, 149695, 163513, 216905, 226135, 233590, 299390, 303667, 327026, 433810, 452270, 607334, 817565, 1518335, 1635130, 2125669, 3036670, 4251338, 10628345, 21256690]

約数ペア:

[(1, 21256690), (2, 10628345), (5, 4251338), (7, 3036670), (10, 2125669), (13, 1635130), (14, 1518335), (26, 817565), (35, 607334), (47, 452270), (49, 433810), (65, 327026), (70, 303667), (71, 299390), (91, 233590), (94, 226135), (98, 216905), (130, 163513), (142, 149695), (182, 116795), (235, 90454), (245, 86762), (329, 64610), (355, 59878), (455, 46718), (470, 45227), (490, 43381), (497, 42770), (611, 34790), (637, 33370), (658, 32305), (710, 29939), (910, 23359), (923, 23030), (994, 21385), (1222, 17395), (1274, 16685), (1645, 12922), (1846, 11515), (2303, 9230), (2485, 8554), (3055, 6958), (3185, 6674), (3290, 6461), (3337, 6370), (3479, 6110), (4277, 4970), (4606, 4615)]