2171820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{5171}}^1$

素因数の和:5190

約数の個数: 48

約数和(自身を含む): 6951168

約数和(自身を除く): 4779348

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 5171, 10342, 15513, 20684, 25855, 31026, 36197, 51710, 62052, 72394, 77565, 103420, 108591, 144788, 155130, 180985, 217182, 310260, 361970, 434364, 542955, 723940, 1085910, 2171820]

約数ペア:

[(1, 2171820), (2, 1085910), (3, 723940), (4, 542955), (5, 434364), (6, 361970), (7, 310260), (10, 217182), (12, 180985), (14, 155130), (15, 144788), (20, 108591), (21, 103420), (28, 77565), (30, 72394), (35, 62052), (42, 51710), (60, 36197), (70, 31026), (84, 25855), (105, 20684), (140, 15513), (210, 10342), (420, 5171)]