20991838

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{457}}^1$

素因数の和:676

約数の個数: 32

約数和(自身を含む): 38384064

約数和(自身を除く): 17392226

約数列:

[1, 2, 7, 14, 17, 34, 119, 193, 238, 386, 457, 914, 1351, 2702, 3199, 3281, 6398, 6562, 7769, 15538, 22967, 45934, 54383, 88201, 108766, 176402, 617407, 1234814, 1499417, 2998834, 10495919, 20991838]

約数ペア:

[(1, 20991838), (2, 10495919), (7, 2998834), (14, 1499417), (17, 1234814), (34, 617407), (119, 176402), (193, 108766), (238, 88201), (386, 54383), (457, 45934), (914, 22967), (1351, 15538), (2702, 7769), (3199, 6562), (3281, 6398)]