20881653

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{499}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 31920000

約数和(自身を除く): 11038347

約数列:

[1, 3, 13, 29, 37, 39, 87, 111, 377, 481, 499, 1073, 1131, 1443, 1497, 3219, 6487, 13949, 14471, 18463, 19461, 41847, 43413, 55389, 188123, 240019, 535427, 564369, 720057, 1606281, 6960551, 20881653]

約数ペア:

[(1, 20881653), (3, 6960551), (13, 1606281), (29, 720057), (37, 564369), (39, 535427), (87, 240019), (111, 188123), (377, 55389), (481, 43413), (499, 41847), (1073, 19461), (1131, 18463), (1443, 14471), (1497, 13949), (3219, 6487)]