18771221

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{1249}}^1$

素因数の和:1388

約数の個数: 16

約数和(自身を含む): 22800000

約数和(自身を除く): 4028779

約数列:

[1, 7, 19, 113, 133, 791, 1249, 2147, 8743, 15029, 23731, 141137, 166117, 987959, 2681603, 18771221]

約数ペア:

[(1, 18771221), (7, 2681603), (19, 987959), (113, 166117), (133, 141137), (791, 23731), (1249, 15029), (2147, 8743)]