19781795

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21157}}^1$

素因数の和:21190

約数の個数: 16

約数和(自身を含む): 27420768

約数和(自身を除く): 7638973

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 21157, 105785, 232727, 359669, 1163635, 1798345, 3956359, 19781795]

約数ペア:

[(1, 19781795), (5, 3956359), (11, 1798345), (17, 1163635), (55, 359669), (85, 232727), (187, 105785), (935, 21157)]