21198965

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^2\times {\mathrm{163}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 27689760

約数和(自身を除く): 6490795

約数列:

[1, 5, 19, 37, 95, 163, 185, 703, 815, 1369, 3097, 3515, 6031, 6845, 15485, 26011, 30155, 114589, 130055, 223147, 572945, 1115735, 4239793, 21198965]

約数ペア:

[(1, 21198965), (5, 4239793), (19, 1115735), (37, 572945), (95, 223147), (163, 130055), (185, 114589), (703, 30155), (815, 26011), (1369, 15485), (3097, 6845), (3515, 6031)]