990140

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1597}}^1$

素因数の和:1637

約数の個数: 24

約数和(自身を含む): 2147712

約数和(自身を除く): 1157572

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 1597, 3194, 6388, 7985, 15970, 31940, 49507, 99014, 198028, 247535, 495070, 990140]

約数ペア:

[(1, 990140), (2, 495070), (4, 247535), (5, 198028), (10, 99014), (20, 49507), (31, 31940), (62, 15970), (124, 7985), (155, 6388), (310, 3194), (620, 1597)]