19989875

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 27630720

約数和(自身を除く): 7640845

約数列:

[1, 5, 17, 23, 25, 85, 115, 125, 391, 409, 425, 575, 1955, 2045, 2125, 2875, 6953, 9407, 9775, 10225, 34765, 47035, 48875, 51125, 159919, 173825, 235175, 799595, 869125, 1175875, 3997975, 19989875]

約数ペア:

[(1, 19989875), (5, 3997975), (17, 1175875), (23, 869125), (25, 799595), (85, 235175), (115, 173825), (125, 159919), (391, 51125), (409, 48875), (425, 47035), (575, 34765), (1955, 10225), (2045, 9775), (2125, 9407), (2875, 6953)]