21097660

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6719}}^1$

素因数の和:6885

約数の個数: 24

約数和(自身を含む): 44593920

約数和(自身を除く): 23496260

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6719, 13438, 26876, 33595, 67190, 134380, 1054883, 2109766, 4219532, 5274415, 10548830, 21097660]

約数ペア:

[(1, 21097660), (2, 10548830), (4, 5274415), (5, 4219532), (10, 2109766), (20, 1054883), (157, 134380), (314, 67190), (628, 33595), (785, 26876), (1570, 13438), (3140, 6719)]