21006984207

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1637}}^1\times {\mathrm{5477}}^1$

素因数の和:7199

約数の個数: 32

約数和(自身を含む): 31010563584

約数和(自身を除く): 10003579377

約数列:

[1, 3, 11, 33, 71, 213, 781, 1637, 2343, 4911, 5477, 16431, 18007, 54021, 60247, 116227, 180741, 348681, 388867, 1166601, 1278497, 3835491, 4277537, 8965849, 12832611, 26897547, 98624339, 295873017, 636575279, 1909725837, 7002328069, 21006984207]

約数ペア:

[(1, 21006984207), (3, 7002328069), (11, 1909725837), (33, 636575279), (71, 295873017), (213, 98624339), (781, 26897547), (1637, 12832611), (2343, 8965849), (4911, 4277537), (5477, 3835491), (16431, 1278497), (18007, 1166601), (54021, 388867), (60247, 348681), (116227, 180741)]