20728323

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4273}}^1$

素因数の和:4304

約数の個数: 36

約数和(自身を含む): 38004408

約数和(自身を除く): 17276085

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4273, 4851, 12819, 29911, 38457, 47003, 89733, 141009, 209377, 269199, 329021, 423027, 628131, 987063, 1884393, 2303147, 2961189, 6909441, 20728323]

約数ペア:

[(1, 20728323), (3, 6909441), (7, 2961189), (9, 2303147), (11, 1884393), (21, 987063), (33, 628131), (49, 423027), (63, 329021), (77, 269199), (99, 209377), (147, 141009), (231, 89733), (441, 47003), (539, 38457), (693, 29911), (1617, 12819), (4273, 4851)]