21236445

素因数分解:

$3^3\times 5^1\times {\mathrm{157307}}^1$

素因数の和:157321

約数の個数: 16

約数和(自身を含む): 37753920

約数和(自身を除く): 16517475

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157307, 471921, 786535, 1415763, 2359605, 4247289, 7078815, 21236445]

約数ペア:

[(1, 21236445), (3, 7078815), (5, 4247289), (9, 2359605), (15, 1415763), (27, 786535), (45, 471921), (135, 157307)]