19792990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1801}}^1$

素因数の和:1972

約数の個数: 32

約数和(自身を含む): 40999104

約数和(自身を除く): 21206114

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 157, 314, 785, 1099, 1570, 1801, 2198, 3602, 5495, 9005, 10990, 12607, 18010, 25214, 63035, 126070, 282757, 565514, 1413785, 1979299, 2827570, 3958598, 9896495, 19792990]

約数ペア:

[(1, 19792990), (2, 9896495), (5, 3958598), (7, 2827570), (10, 1979299), (14, 1413785), (35, 565514), (70, 282757), (157, 126070), (314, 63035), (785, 25214), (1099, 18010), (1570, 12607), (1801, 10990), (2198, 9005), (3602, 5495)]