18972976

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 80

約数和(自身を含む): 43211520

約数和(自身を除く): 24238544

約数列:

[1, 2, 4, 8, 11, 16, 22, 23, 43, 44, 46, 86, 88, 92, 109, 172, 176, 184, 218, 253, 344, 368, 436, 473, 506, 688, 872, 946, 989, 1012, 1199, 1744, 1892, 1978, 2024, 2398, 2507, 3784, 3956, 4048, 4687, 4796, 5014, 7568, 7912, 9374, 9592, 10028, 10879, 15824, 18748, 19184, 20056, 21758, 27577, 37496, 40112, 43516, 51557, 55154, 74992, 87032, 103114, 107801, 110308, 174064, 206228, 215602, 220616, 412456, 431204, 441232, 824912, 862408, 1185811, 1724816, 2371622, 4743244, 9486488, 18972976]

約数ペア:

[(1, 18972976), (2, 9486488), (4, 4743244), (8, 2371622), (11, 1724816), (16, 1185811), (22, 862408), (23, 824912), (43, 441232), (44, 431204), (46, 412456), (86, 220616), (88, 215602), (92, 206228), (109, 174064), (172, 110308), (176, 107801), (184, 103114), (218, 87032), (253, 74992), (344, 55154), (368, 51557), (436, 43516), (473, 40112), (506, 37496), (688, 27577), (872, 21758), (946, 20056), (989, 19184), (1012, 18748), (1199, 15824), (1744, 10879), (1892, 10028), (1978, 9592), (2024, 9374), (2398, 7912), (2507, 7568), (3784, 5014), (3956, 4796), (4048, 4687)]