81315940

素因数分解:

$2^2\times 5^1\times {\mathrm{227}}^1\times {\mathrm{17911}}^1$

素因数の和:18147

約数の個数: 24

約数和(自身を含む): 171525312

約数和(自身を除く): 90209372

約数列:

[1, 2, 4, 5, 10, 20, 227, 454, 908, 1135, 2270, 4540, 17911, 35822, 71644, 89555, 179110, 358220, 4065797, 8131594, 16263188, 20328985, 40657970, 81315940]

約数ペア:

[(1, 81315940), (2, 40657970), (4, 20328985), (5, 16263188), (10, 8131594), (20, 4065797), (227, 358220), (454, 179110), (908, 89555), (1135, 71644), (2270, 35822), (4540, 17911)]