19989361

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{683}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 23704704

約数和(自身を除く): 3715343

約数列:

[1, 7, 37, 113, 259, 683, 791, 4181, 4781, 25271, 29267, 77179, 176897, 540253, 2855623, 19989361]

約数ペア:

[(1, 19989361), (7, 2855623), (37, 540253), (113, 176897), (259, 77179), (683, 29267), (791, 25271), (4181, 4781)]