21979317

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{101}}^1\times {\mathrm{251}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 31564512

約数和(自身を除く): 9585195

約数列:

[1, 3, 17, 51, 101, 251, 289, 303, 753, 867, 1717, 4267, 5151, 12801, 25351, 29189, 72539, 76053, 87567, 217617, 430967, 1292901, 7326439, 21979317]

約数ペア:

[(1, 21979317), (3, 7326439), (17, 1292901), (51, 430967), (101, 217617), (251, 87567), (289, 76053), (303, 72539), (753, 29189), (867, 25351), (1717, 12801), (4267, 5151)]