19811638

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{1249}}^1$

素因数の和:1372

約数の個数: 32

約数和(自身を含む): 37440000

約数和(自身を除く): 17628362

約数列:

[1, 2, 7, 11, 14, 22, 77, 103, 154, 206, 721, 1133, 1249, 1442, 2266, 2498, 7931, 8743, 13739, 15862, 17486, 27478, 96173, 128647, 192346, 257294, 900529, 1415117, 1801058, 2830234, 9905819, 19811638]

約数ペア:

[(1, 19811638), (2, 9905819), (7, 2830234), (11, 1801058), (14, 1415117), (22, 900529), (77, 257294), (103, 192346), (154, 128647), (206, 96173), (721, 27478), (1133, 17486), (1249, 15862), (1442, 13739), (2266, 8743), (2498, 7931)]