18781329

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{457}}^1$

素因数の和:589

約数の個数: 32

約数和(自身を含む): 30484480

約数和(自身を除く): 11703151

約数列:

[1, 3, 7, 19, 21, 57, 103, 133, 309, 399, 457, 721, 1371, 1957, 2163, 3199, 5871, 8683, 9597, 13699, 26049, 41097, 47071, 60781, 141213, 182343, 329497, 894349, 988491, 2683047, 6260443, 18781329]

約数ペア:

[(1, 18781329), (3, 6260443), (7, 2683047), (19, 988491), (21, 894349), (57, 329497), (103, 182343), (133, 141213), (309, 60781), (399, 47071), (457, 41097), (721, 26049), (1371, 13699), (1957, 9597), (2163, 8683), (3199, 5871)]