19780112

素因数分解:

$2^4\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{601}}^1$

素因数の和:648

約数の個数: 60

約数和(自身を含む): 44676828

約数和(自身を除く): 24896716

約数列:

[1, 2, 4, 8, 11, 16, 17, 22, 34, 44, 68, 88, 121, 136, 176, 187, 242, 272, 374, 484, 601, 748, 968, 1202, 1496, 1936, 2057, 2404, 2992, 4114, 4808, 6611, 8228, 9616, 10217, 13222, 16456, 20434, 26444, 32912, 40868, 52888, 72721, 81736, 105776, 112387, 145442, 163472, 224774, 290884, 449548, 581768, 899096, 1163536, 1236257, 1798192, 2472514, 4945028, 9890056, 19780112]

約数ペア:

[(1, 19780112), (2, 9890056), (4, 4945028), (8, 2472514), (11, 1798192), (16, 1236257), (17, 1163536), (22, 899096), (34, 581768), (44, 449548), (68, 290884), (88, 224774), (121, 163472), (136, 145442), (176, 112387), (187, 105776), (242, 81736), (272, 72721), (374, 52888), (484, 40868), (601, 32912), (748, 26444), (968, 20434), (1202, 16456), (1496, 13222), (1936, 10217), (2057, 9616), (2404, 8228), (2992, 6611), (4114, 4808)]