21851230

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{20047}}^1$

素因数の和:20163

約数の個数: 16

約数和(自身を含む): 39695040

約数和(自身を除く): 17843810

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 20047, 40094, 100235, 200470, 2185123, 4370246, 10925615, 21851230]

約数ペア:

[(1, 21851230), (2, 10925615), (5, 4370246), (10, 2185123), (109, 200470), (218, 100235), (545, 40094), (1090, 20047)]