19997037

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{8513}}^1$

素因数の和:8554

約数の個数: 20

約数和(自身を含む): 30905820

約数和(自身を除く): 10908783

約数列:

[1, 3, 9, 27, 29, 81, 87, 261, 783, 2349, 8513, 25539, 76617, 229851, 246877, 689553, 740631, 2221893, 6665679, 19997037]

約数ペア:

[(1, 19997037), (3, 6665679), (9, 2221893), (27, 740631), (29, 689553), (81, 246877), (87, 229851), (261, 76617), (783, 25539), (2349, 8513)]