21185793

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{7069}}^1$

素因数の和:7118

約数の個数: 20

約数和(自身を含む): 32507860

約数和(自身を除く): 11322067

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 7069, 21207, 63621, 190863, 261553, 572589, 784659, 2353977, 7061931, 21185793]

約数ペア:

[(1, 21185793), (3, 7061931), (9, 2353977), (27, 784659), (37, 572589), (81, 261553), (111, 190863), (333, 63621), (999, 21207), (2997, 7069)]