20446640

素因数分解:

$2^4\times 5^1\times {\mathrm{431}}^1\times {\mathrm{593}}^1$

素因数の和:1037

約数の個数: 40

約数和(自身を含む): 47729088

約数和(自身を除く): 27282448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 431, 593, 862, 1186, 1724, 2155, 2372, 2965, 3448, 4310, 4744, 5930, 6896, 8620, 9488, 11860, 17240, 23720, 34480, 47440, 255583, 511166, 1022332, 1277915, 2044664, 2555830, 4089328, 5111660, 10223320, 20446640]

約数ペア:

[(1, 20446640), (2, 10223320), (4, 5111660), (5, 4089328), (8, 2555830), (10, 2044664), (16, 1277915), (20, 1022332), (40, 511166), (80, 255583), (431, 47440), (593, 34480), (862, 23720), (1186, 17240), (1724, 11860), (2155, 9488), (2372, 8620), (2965, 6896), (3448, 5930), (4310, 4744)]