21157845

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{34403}}^1$

素因数の和:34452

約数の個数: 16

約数和(自身を含む): 34679232

約数和(自身を除く): 13521387

約数列:

[1, 3, 5, 15, 41, 123, 205, 615, 34403, 103209, 172015, 516045, 1410523, 4231569, 7052615, 21157845]

約数ペア:

[(1, 21157845), (3, 7052615), (5, 4231569), (15, 1410523), (41, 516045), (123, 172015), (205, 103209), (615, 34403)]