21180123

素因数分解:

$3^5\times {\mathrm{43}}^1\times {\mathrm{2027}}^1$

素因数の和:2085

約数の個数: 24

約数和(自身を含む): 32480448

約数和(自身を除く): 11300325

約数列:

[1, 3, 9, 27, 43, 81, 129, 243, 387, 1161, 2027, 3483, 6081, 10449, 18243, 54729, 87161, 164187, 261483, 492561, 784449, 2353347, 7060041, 21180123]

約数ペア:

[(1, 21180123), (3, 7060041), (9, 2353347), (27, 784449), (43, 492561), (81, 261483), (129, 164187), (243, 87161), (387, 54729), (1161, 18243), (2027, 10449), (3483, 6081)]