19777681

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{521}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 27060480

約数和(自身を除く): 7282799

約数列:

[1, 7, 11, 17, 29, 77, 119, 187, 203, 319, 493, 521, 1309, 2233, 3451, 3647, 5423, 5731, 8857, 15109, 37961, 40117, 61999, 97427, 105763, 166199, 256853, 681989, 1163393, 1797971, 2825383, 19777681]

約数ペア:

[(1, 19777681), (7, 2825383), (11, 1797971), (17, 1163393), (29, 681989), (77, 256853), (119, 166199), (187, 105763), (203, 97427), (319, 61999), (493, 40117), (521, 37961), (1309, 15109), (2233, 8857), (3451, 5731), (3647, 5423)]