18998474

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 32555520

約数和(自身を除く): 13557046

約数列:

[1, 2, 11, 22, 31, 62, 89, 178, 313, 341, 626, 682, 979, 1958, 2759, 3443, 5518, 6886, 9703, 19406, 27857, 30349, 55714, 60698, 106733, 213466, 306427, 612854, 863567, 1727134, 9499237, 18998474]

約数ペア:

[(1, 18998474), (2, 9499237), (11, 1727134), (22, 863567), (31, 612854), (62, 306427), (89, 213466), (178, 106733), (313, 60698), (341, 55714), (626, 30349), (682, 27857), (979, 19406), (1958, 9703), (2759, 6886), (3443, 5518)]