18978825

素因数分解:

$3^1\times 5^2\times {\mathrm{59}}^1\times {\mathrm{4289}}^1$

素因数の和:4361

約数の個数: 24

約数和(自身を含む): 31917600

約数和(自身を除く): 12938775

約数列:

[1, 3, 5, 15, 25, 59, 75, 177, 295, 885, 1475, 4289, 4425, 12867, 21445, 64335, 107225, 253051, 321675, 759153, 1265255, 3795765, 6326275, 18978825]

約数ペア:

[(1, 18978825), (3, 6326275), (5, 3795765), (15, 1265255), (25, 759153), (59, 321675), (75, 253051), (177, 107225), (295, 64335), (885, 21445), (1475, 12867), (4289, 4425)]