20996577

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1949}}^1$

素因数の和:1987

約数の個数: 40

約数和(自身を含む): 37752000

約数和(自身を除く): 16755423

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 399, 513, 567, 1197, 1539, 1949, 3591, 5847, 10773, 13643, 17541, 37031, 40929, 52623, 111093, 122787, 157869, 259217, 333279, 368361, 777651, 999837, 1105083, 2332953, 2999511, 6998859, 20996577]

約数ペア:

[(1, 20996577), (3, 6998859), (7, 2999511), (9, 2332953), (19, 1105083), (21, 999837), (27, 777651), (57, 368361), (63, 333279), (81, 259217), (133, 157869), (171, 122787), (189, 111093), (399, 52623), (513, 40929), (567, 37031), (1197, 17541), (1539, 13643), (1949, 10773), (3591, 5847)]