21071701

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{179}}^1\times {\mathrm{251}}^1$

素因数の和:504

約数の個数: 16

約数和(自身を含む): 24675840

約数和(自身を除く): 3604139

約数列:

[1, 7, 67, 179, 251, 469, 1253, 1757, 11993, 16817, 44929, 83951, 117719, 314503, 3010243, 21071701]

約数ペア:

[(1, 21071701), (7, 3010243), (67, 314503), (179, 117719), (251, 83951), (469, 44929), (1253, 16817), (1757, 11993)]