81395468

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1987}}^1$

素因数の和:2035

約数の個数: 72

約数和(自身を含む): 190370880

約数和(自身を除く): 108975412

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 49, 76, 77, 98, 133, 154, 196, 209, 266, 308, 418, 532, 539, 836, 931, 1078, 1463, 1862, 1987, 2156, 2926, 3724, 3974, 5852, 7948, 10241, 13909, 20482, 21857, 27818, 37753, 40964, 43714, 55636, 75506, 87428, 97363, 151012, 152999, 194726, 264271, 305998, 389452, 415283, 528542, 611996, 830566, 1057084, 1070993, 1661132, 1849897, 2141986, 2906981, 3699794, 4283972, 5813962, 7399588, 11627924, 20348867, 40697734, 81395468]

約数ペア:

[(1, 81395468), (2, 40697734), (4, 20348867), (7, 11627924), (11, 7399588), (14, 5813962), (19, 4283972), (22, 3699794), (28, 2906981), (38, 2141986), (44, 1849897), (49, 1661132), (76, 1070993), (77, 1057084), (98, 830566), (133, 611996), (154, 528542), (196, 415283), (209, 389452), (266, 305998), (308, 264271), (418, 194726), (532, 152999), (539, 151012), (836, 97363), (931, 87428), (1078, 75506), (1463, 55636), (1862, 43714), (1987, 40964), (2156, 37753), (2926, 27818), (3724, 21857), (3974, 20482), (5852, 13909), (7948, 10241)]