19921360

素因数分解:

$2^4\times 5^1\times {\mathrm{249017}}^1$

素因数の和:249030

約数の個数: 20

約数和(自身を含む): 46317348

約数和(自身を除く): 26395988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249017, 498034, 996068, 1245085, 1992136, 2490170, 3984272, 4980340, 9960680, 19921360]

約数ペア:

[(1, 19921360), (2, 9960680), (4, 4980340), (5, 3984272), (8, 2490170), (10, 1992136), (16, 1245085), (20, 996068), (40, 498034), (80, 249017)]