21292131

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{409}}^1$

素因数の和:523

約数の個数: 32

約数和(自身を含む): 33902080

約数和(自身を除く): 12609949

約数列:

[1, 3, 7, 21, 37, 67, 111, 201, 259, 409, 469, 777, 1227, 1407, 2479, 2863, 7437, 8589, 15133, 17353, 27403, 45399, 52059, 82209, 105931, 191821, 317793, 575463, 1013911, 3041733, 7097377, 21292131]

約数ペア:

[(1, 21292131), (3, 7097377), (7, 3041733), (21, 1013911), (37, 575463), (67, 317793), (111, 191821), (201, 105931), (259, 82209), (409, 52059), (469, 45399), (777, 27403), (1227, 17353), (1407, 15133), (2479, 8589), (2863, 7437)]