19801859

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{1123}}^1$

素因数の和:1370

約数の個数: 16

約数和(自身を含む): 24817920

約数和(自身を除く): 5016061

約数列:

[1, 7, 11, 77, 229, 1123, 1603, 2519, 7861, 12353, 17633, 86471, 257167, 1800169, 2828837, 19801859]

約数ペア:

[(1, 19801859), (7, 2828837), (11, 1800169), (77, 257167), (229, 86471), (1123, 17633), (1603, 12353), (2519, 7861)]