20628573

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{191}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 12057507

約数列:

[1, 3, 7, 21, 37, 111, 139, 191, 259, 417, 573, 777, 973, 1337, 2919, 4011, 5143, 7067, 15429, 21201, 26549, 36001, 49469, 79647, 108003, 148407, 185843, 557529, 982313, 2946939, 6876191, 20628573]

約数ペア:

[(1, 20628573), (3, 6876191), (7, 2946939), (21, 982313), (37, 557529), (111, 185843), (139, 148407), (191, 108003), (259, 79647), (417, 49469), (573, 36001), (777, 26549), (973, 21201), (1337, 15429), (2919, 7067), (4011, 5143)]