19712763

素因数分解:

$3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1993}}^1$

素因数の和:2163

約数の個数: 24

約数和(自身を含む): 32765408

約数和(自身を除く): 13052645

約数列:

[1, 3, 7, 9, 21, 63, 157, 471, 1099, 1413, 1993, 3297, 5979, 9891, 13951, 17937, 41853, 125559, 312901, 938703, 2190307, 2816109, 6570921, 19712763]

約数ペア:

[(1, 19712763), (3, 6570921), (7, 2816109), (9, 2190307), (21, 938703), (63, 312901), (157, 125559), (471, 41853), (1099, 17937), (1413, 13951), (1993, 9891), (3297, 5979)]