19813880

素因数分解:

$2^3\times 5^1\times {\mathrm{495347}}^1$

素因数の和:495358

約数の個数: 16

約数和(自身を含む): 44581320

約数和(自身を除く): 24767440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495347, 990694, 1981388, 2476735, 3962776, 4953470, 9906940, 19813880]

約数ペア:

[(1, 19813880), (2, 9906940), (4, 4953470), (5, 3962776), (8, 2476735), (10, 1981388), (20, 990694), (40, 495347)]