19978574

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:501

約数の個数: 48

約数和(自身を含む): 39004416

約数和(自身を除く): 19025842

約数列:

[1, 2, 7, 11, 14, 22, 43, 49, 77, 86, 98, 154, 301, 431, 473, 539, 602, 862, 946, 1078, 2107, 3017, 3311, 4214, 4741, 6034, 6622, 9482, 18533, 21119, 23177, 33187, 37066, 42238, 46354, 66374, 129731, 203863, 232309, 259462, 407726, 464618, 908117, 1427041, 1816234, 2854082, 9989287, 19978574]

約数ペア:

[(1, 19978574), (2, 9989287), (7, 2854082), (11, 1816234), (14, 1427041), (22, 908117), (43, 464618), (49, 407726), (77, 259462), (86, 232309), (98, 203863), (154, 129731), (301, 66374), (431, 46354), (473, 42238), (539, 37066), (602, 33187), (862, 23177), (946, 21119), (1078, 18533), (2107, 9482), (3017, 6622), (3311, 6034), (4214, 4741)]