20308900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4723}}^1$

素因数の和:4780

約数の個数: 36

約数和(自身を含む): 45104752

約数和(自身を除く): 24795852

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4723, 9446, 18892, 23615, 47230, 94460, 118075, 203089, 236150, 406178, 472300, 812356, 1015445, 2030890, 4061780, 5077225, 10154450, 20308900]

約数ペア:

[(1, 20308900), (2, 10154450), (4, 5077225), (5, 4061780), (10, 2030890), (20, 1015445), (25, 812356), (43, 472300), (50, 406178), (86, 236150), (100, 203089), (172, 118075), (215, 94460), (430, 47230), (860, 23615), (1075, 18892), (2150, 9446), (4300, 4723)]