19402971

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{6947}}^1$

素因数の和:6983

約数の個数: 24

約数和(自身を含む): 31682880

約数和(自身を除く): 12279909

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 6947, 20841, 48629, 131993, 145887, 340403, 395979, 923951, 1021209, 2771853, 6467657, 19402971]

約数ペア:

[(1, 19402971), (3, 6467657), (7, 2771853), (19, 1021209), (21, 923951), (49, 395979), (57, 340403), (133, 145887), (147, 131993), (399, 48629), (931, 20841), (2793, 6947)]