20017575

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2069}}^1$

素因数の和:2128

約数の個数: 36

約数和(自身を含む): 36705240

約数和(自身を除く): 16687665

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2069, 3225, 6207, 9675, 10345, 18621, 31035, 51725, 88967, 93105, 155175, 266901, 444835, 465525, 800703, 1334505, 2224175, 4003515, 6672525, 20017575]

約数ペア:

[(1, 20017575), (3, 6672525), (5, 4003515), (9, 2224175), (15, 1334505), (25, 800703), (43, 465525), (45, 444835), (75, 266901), (129, 155175), (215, 93105), (225, 88967), (387, 51725), (645, 31035), (1075, 18621), (1935, 10345), (2069, 9675), (3225, 6207)]