21471289

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{2693}}^1$

素因数の和:2784

約数の個数: 16

約数和(自身を含む): 26379648

約数和(自身を除く): 4908359

約数列:

[1, 7, 17, 67, 119, 469, 1139, 2693, 7973, 18851, 45781, 180431, 320467, 1263017, 3067327, 21471289]

約数ペア:

[(1, 21471289), (7, 3067327), (17, 1263017), (67, 320467), (119, 180431), (469, 45781), (1139, 18851), (2693, 7973)]