81447020

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{41983}}^1$

素因数の和:42089

約数の個数: 24

約数和(自身を含む): 172806144

約数和(自身を除く): 91359124

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 41983, 83966, 167932, 209915, 419830, 839660, 4072351, 8144702, 16289404, 20361755, 40723510, 81447020]

約数ペア:

[(1, 81447020), (2, 40723510), (4, 20361755), (5, 16289404), (10, 8144702), (20, 4072351), (97, 839660), (194, 419830), (388, 209915), (485, 167932), (970, 83966), (1940, 41983)]