20005678

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{3511}}^1$

素因数の和:3568

約数の個数: 32

約数和(自身を含む): 38435328

約数和(自身を除く): 18429650

約数列:

[1, 2, 7, 11, 14, 22, 37, 74, 77, 154, 259, 407, 518, 814, 2849, 3511, 5698, 7022, 24577, 38621, 49154, 77242, 129907, 259814, 270347, 540694, 909349, 1428977, 1818698, 2857954, 10002839, 20005678]

約数ペア:

[(1, 20005678), (2, 10002839), (7, 2857954), (11, 1818698), (14, 1428977), (22, 909349), (37, 540694), (74, 270347), (77, 259814), (154, 129907), (259, 77242), (407, 49154), (518, 38621), (814, 24577), (2849, 7022), (3511, 5698)]