21998487

素因数分解:

$3^1\times 7^1\times {\mathrm{887}}^1\times {\mathrm{1181}}^1$

素因数の和:2078

約数の個数: 16

約数和(自身を含む): 33587712

約数和(自身を除く): 11589225

約数列:

[1, 3, 7, 21, 887, 1181, 2661, 3543, 6209, 8267, 18627, 24801, 1047547, 3142641, 7332829, 21998487]

約数ペア:

[(1, 21998487), (3, 7332829), (7, 3142641), (21, 1047547), (887, 24801), (1181, 18627), (2661, 8267), (3543, 6209)]