19971998

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{2459}}^1$

素因数の和:2623

約数の個数: 16

約数和(自身を含む): 31173120

約数和(自身を除く): 11201122

約数列:

[1, 2, 31, 62, 131, 262, 2459, 4061, 4918, 8122, 76229, 152458, 322129, 644258, 9985999, 19971998]

約数ペア:

[(1, 19971998), (2, 9985999), (31, 644258), (62, 322129), (131, 152458), (262, 76229), (2459, 8122), (4061, 4918)]