19996935

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{103}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 37799424

約数和(自身を除く): 17802489

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 103, 105, 129, 215, 301, 309, 515, 645, 721, 903, 1505, 1545, 1849, 2163, 3605, 4429, 4515, 5547, 9245, 10815, 12943, 13287, 22145, 27735, 31003, 38829, 64715, 66435, 93009, 155015, 190447, 194145, 465045, 571341, 952235, 1333129, 2856705, 3999387, 6665645, 19996935]

約数ペア:

[(1, 19996935), (3, 6665645), (5, 3999387), (7, 2856705), (15, 1333129), (21, 952235), (35, 571341), (43, 465045), (103, 194145), (105, 190447), (129, 155015), (215, 93009), (301, 66435), (309, 64715), (515, 38829), (645, 31003), (721, 27735), (903, 22145), (1505, 13287), (1545, 12943), (1849, 10815), (2163, 9245), (3605, 5547), (4429, 4515)]