28388787

素因数分解:

$3^1\times 7^2\times {\mathrm{313}}^1\times {\mathrm{617}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 44243856

約数和(自身を除く): 15855069

約数列:

[1, 3, 7, 21, 49, 147, 313, 617, 939, 1851, 2191, 4319, 6573, 12957, 15337, 30233, 46011, 90699, 193121, 579363, 1351847, 4055541, 9462929, 28388787]

約数ペア:

[(1, 28388787), (3, 9462929), (7, 4055541), (21, 1351847), (49, 579363), (147, 193121), (313, 90699), (617, 46011), (939, 30233), (1851, 15337), (2191, 12957), (4319, 6573)]