21421820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21859}}^1$

素因数の和:21882

約数の個数: 36

約数和(自身を含む): 52332840

約数和(自身を除く): 30911020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21859, 43718, 87436, 109295, 153013, 218590, 306026, 437180, 612052, 765065, 1071091, 1530130, 2142182, 3060260, 4284364, 5355455, 10710910, 21421820]

約数ペア:

[(1, 21421820), (2, 10710910), (4, 5355455), (5, 4284364), (7, 3060260), (10, 2142182), (14, 1530130), (20, 1071091), (28, 765065), (35, 612052), (49, 437180), (70, 306026), (98, 218590), (140, 153013), (196, 109295), (245, 87436), (490, 43718), (980, 21859)]