20591739

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1579}}^1$

素因数の和:1621

約数の個数: 40

約数和(自身を含む): 36706560

約数和(自身を除く): 16114821

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1579, 1863, 4347, 4737, 11053, 13041, 14211, 33159, 36317, 42633, 99477, 108951, 127899, 254219, 298431, 326853, 762657, 895293, 980559, 2287971, 2941677, 6863913, 20591739]

約数ペア:

[(1, 20591739), (3, 6863913), (7, 2941677), (9, 2287971), (21, 980559), (23, 895293), (27, 762657), (63, 326853), (69, 298431), (81, 254219), (161, 127899), (189, 108951), (207, 99477), (483, 42633), (567, 36317), (621, 33159), (1449, 14211), (1579, 13041), (1863, 11053), (4347, 4737)]