18923681

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:488

約数の個数: 16

約数和(自身を含む): 22175616

約数和(自身を除く): 3251935

約数列:

[1, 7, 67, 157, 257, 469, 1099, 1799, 10519, 17219, 40349, 73633, 120533, 282443, 2703383, 18923681]

約数ペア:

[(1, 18923681), (7, 2703383), (67, 282443), (157, 120533), (257, 73633), (469, 40349), (1099, 17219), (1799, 10519)]