28879221

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{72379}}^1$

素因数の和:72408

約数の個数: 16

約数和(自身を含む): 46323200

約数和(自身を除く): 17443979

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 72379, 217137, 506653, 1375201, 1519959, 4125603, 9626407, 28879221]

約数ペア:

[(1, 28879221), (3, 9626407), (7, 4125603), (19, 1519959), (21, 1375201), (57, 506653), (133, 217137), (399, 72379)]