21154855

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{347}}^1$

素因数の和:578

約数の個数: 16

約数和(自身を含む): 25932960

約数和(自身を除く): 4778105

約数列:

[1, 5, 89, 137, 347, 445, 685, 1735, 12193, 30883, 47539, 60965, 154415, 237695, 4230971, 21154855]

約数ペア:

[(1, 21154855), (5, 4230971), (89, 237695), (137, 154415), (347, 60965), (445, 47539), (685, 30883), (1735, 12193)]