21991008

素因数分解:

$2^5\times 3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1$

素因数の和:356

約数の個数: 96

約数和(自身を含む): 63334656

約数和(自身を除く): 41343648

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 67, 78, 96, 104, 134, 156, 201, 208, 263, 268, 312, 402, 416, 526, 536, 624, 789, 804, 871, 1052, 1072, 1248, 1578, 1608, 1742, 2104, 2144, 2613, 3156, 3216, 3419, 3484, 4208, 5226, 6312, 6432, 6838, 6968, 8416, 10257, 10452, 12624, 13676, 13936, 17621, 20514, 20904, 25248, 27352, 27872, 35242, 41028, 41808, 52863, 54704, 70484, 82056, 83616, 105726, 109408, 140968, 164112, 211452, 229073, 281936, 328224, 422904, 458146, 563872, 687219, 845808, 916292, 1374438, 1691616, 1832584, 2748876, 3665168, 5497752, 7330336, 10995504, 21991008]

約数ペア:

[(1, 21991008), (2, 10995504), (3, 7330336), (4, 5497752), (6, 3665168), (8, 2748876), (12, 1832584), (13, 1691616), (16, 1374438), (24, 916292), (26, 845808), (32, 687219), (39, 563872), (48, 458146), (52, 422904), (67, 328224), (78, 281936), (96, 229073), (104, 211452), (134, 164112), (156, 140968), (201, 109408), (208, 105726), (263, 83616), (268, 82056), (312, 70484), (402, 54704), (416, 52863), (526, 41808), (536, 41028), (624, 35242), (789, 27872), (804, 27352), (871, 25248), (1052, 20904), (1072, 20514), (1248, 17621), (1578, 13936), (1608, 13676), (1742, 12624), (2104, 10452), (2144, 10257), (2613, 8416), (3156, 6968), (3216, 6838), (3419, 6432), (3484, 6312), (4208, 5226)]