20786780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21211}}^1$

素因数の和:21234

約数の個数: 36

約数和(自身を含む): 50781528

約数和(自身を除く): 29994748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21211, 42422, 84844, 106055, 148477, 212110, 296954, 424220, 593908, 742385, 1039339, 1484770, 2078678, 2969540, 4157356, 5196695, 10393390, 20786780]

約数ペア:

[(1, 20786780), (2, 10393390), (4, 5196695), (5, 4157356), (7, 2969540), (10, 2078678), (14, 1484770), (20, 1039339), (28, 742385), (35, 593908), (49, 424220), (70, 296954), (98, 212110), (140, 148477), (196, 106055), (245, 84844), (490, 42422), (980, 21211)]