20870379

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:293

約数の個数: 40

約数和(自身を含む): 33454080

約数和(自身を除く): 12583701

約数列:

[1, 3, 9, 19, 27, 57, 71, 81, 171, 191, 213, 513, 573, 639, 1349, 1539, 1719, 1917, 3629, 4047, 5157, 5751, 10887, 12141, 13561, 15471, 32661, 36423, 40683, 97983, 109269, 122049, 257659, 293949, 366147, 772977, 1098441, 2318931, 6956793, 20870379]

約数ペア:

[(1, 20870379), (3, 6956793), (9, 2318931), (19, 1098441), (27, 772977), (57, 366147), (71, 293949), (81, 257659), (171, 122049), (191, 109269), (213, 97983), (513, 40683), (573, 36423), (639, 32661), (1349, 15471), (1539, 13561), (1719, 12141), (1917, 10887), (3629, 5751), (4047, 5157)]