21137883

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{1553}}^1$

素因数の和:1918

約数の個数: 16

約数和(自身を含む): 30458400

約数和(自身を除く): 9320517

約数列:

[1, 3, 13, 39, 349, 1047, 1553, 4537, 4659, 13611, 20189, 60567, 541997, 1625991, 7045961, 21137883]

約数ペア:

[(1, 21137883), (3, 7045961), (13, 1625991), (39, 541997), (349, 60567), (1047, 20189), (1553, 13611), (4537, 4659)]