20643558

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:389

約数の個数: 64

約数和(自身を含む): 47803392

約数和(自身を除く): 27159834

約数列:

[1, 2, 3, 6, 13, 23, 26, 37, 39, 46, 69, 74, 78, 111, 138, 222, 299, 311, 481, 598, 622, 851, 897, 933, 962, 1443, 1702, 1794, 1866, 2553, 2886, 4043, 5106, 7153, 8086, 11063, 11507, 12129, 14306, 21459, 22126, 23014, 24258, 33189, 34521, 42918, 66378, 69042, 92989, 149591, 185978, 264661, 278967, 299182, 448773, 529322, 557934, 793983, 897546, 1587966, 3440593, 6881186, 10321779, 20643558]

約数ペア:

[(1, 20643558), (2, 10321779), (3, 6881186), (6, 3440593), (13, 1587966), (23, 897546), (26, 793983), (37, 557934), (39, 529322), (46, 448773), (69, 299182), (74, 278967), (78, 264661), (111, 185978), (138, 149591), (222, 92989), (299, 69042), (311, 66378), (481, 42918), (598, 34521), (622, 33189), (851, 24258), (897, 23014), (933, 22126), (962, 21459), (1443, 14306), (1702, 12129), (1794, 11507), (1866, 11063), (2553, 8086), (2886, 7153), (4043, 5106)]