21789807

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{269}}^1$

素因数の和:383

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11111313

約数列:

[1, 3, 13, 31, 39, 67, 93, 201, 269, 403, 807, 871, 1209, 2077, 2613, 3497, 6231, 8339, 10491, 18023, 25017, 27001, 54069, 81003, 108407, 234299, 325221, 558713, 702897, 1676139, 7263269, 21789807]

約数ペア:

[(1, 21789807), (3, 7263269), (13, 1676139), (31, 702897), (39, 558713), (67, 325221), (93, 234299), (201, 108407), (269, 81003), (403, 54069), (807, 27001), (871, 25017), (1209, 18023), (2077, 10491), (2613, 8339), (3497, 6231)]