21020390

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{91393}}^1$

素因数の和:91423

約数の個数: 16

約数和(自身を含む): 39482208

約数和(自身を除く): 18461818

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 91393, 182786, 456965, 913930, 2102039, 4204078, 10510195, 21020390]

約数ペア:

[(1, 21020390), (2, 10510195), (5, 4204078), (10, 2102039), (23, 913930), (46, 456965), (115, 182786), (230, 91393)]