18887985

素因数分解:

$3^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{313}}^1$

素因数の和:479

約数の個数: 40

約数和(自身を含む): 34194600

約数和(自身を除く): 15306615

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 149, 313, 405, 447, 745, 939, 1341, 1565, 2235, 2817, 4023, 4695, 6705, 8451, 12069, 14085, 20115, 25353, 42255, 46637, 60345, 126765, 139911, 233185, 419733, 699555, 1259199, 2098665, 3777597, 6295995, 18887985]

約数ペア:

[(1, 18887985), (3, 6295995), (5, 3777597), (9, 2098665), (15, 1259199), (27, 699555), (45, 419733), (81, 233185), (135, 139911), (149, 126765), (313, 60345), (405, 46637), (447, 42255), (745, 25353), (939, 20115), (1341, 14085), (1565, 12069), (2235, 8451), (2817, 6705), (4023, 4695)]