18991982

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:320

約数の個数: 32

約数和(自身を含む): 31363200

約数和(自身を除く): 12371218

約数列:

[1, 2, 19, 38, 43, 59, 86, 118, 197, 394, 817, 1121, 1634, 2242, 2537, 3743, 5074, 7486, 8471, 11623, 16942, 23246, 48203, 96406, 160949, 220837, 321898, 441674, 499789, 999578, 9495991, 18991982]

約数ペア:

[(1, 18991982), (2, 9495991), (19, 999578), (38, 499789), (43, 441674), (59, 321898), (86, 220837), (118, 160949), (197, 96406), (394, 48203), (817, 23246), (1121, 16942), (1634, 11623), (2242, 8471), (2537, 7486), (3743, 5074)]