20961790

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19231}}^1$

素因数の和:19347

約数の個数: 16

約数和(自身を含む): 38079360

約数和(自身を除く): 17117570

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19231, 38462, 96155, 192310, 2096179, 4192358, 10480895, 20961790]

約数ペア:

[(1, 20961790), (2, 10480895), (5, 4192358), (10, 2096179), (109, 192310), (218, 96155), (545, 38462), (1090, 19231)]