402847820

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{227}}^1\times {\mathrm{997}}^1$

素因数の和:1322

約数の個数: 48

約数和(自身を含む): 860116320

約数和(自身を除く): 457268500

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 227, 356, 445, 454, 890, 908, 997, 1135, 1780, 1994, 2270, 3988, 4540, 4985, 9970, 19940, 20203, 40406, 80812, 88733, 101015, 177466, 202030, 226319, 354932, 404060, 443665, 452638, 887330, 905276, 1131595, 1774660, 2263190, 4526380, 20142391, 40284782, 80569564, 100711955, 201423910, 402847820]

約数ペア:

[(1, 402847820), (2, 201423910), (4, 100711955), (5, 80569564), (10, 40284782), (20, 20142391), (89, 4526380), (178, 2263190), (227, 1774660), (356, 1131595), (445, 905276), (454, 887330), (890, 452638), (908, 443665), (997, 404060), (1135, 354932), (1780, 226319), (1994, 202030), (2270, 177466), (3988, 101015), (4540, 88733), (4985, 80812), (9970, 40406), (19940, 20203)]