21319767

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1979}}^1$

素因数の和:2017

約数の個数: 40

約数和(自身を含む): 38332800

約数和(自身を除く): 17013033

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 399, 513, 567, 1197, 1539, 1979, 3591, 5937, 10773, 13853, 17811, 37601, 41559, 53433, 112803, 124677, 160299, 263207, 338409, 374031, 789621, 1015227, 1122093, 2368863, 3045681, 7106589, 21319767]

約数ペア:

[(1, 21319767), (3, 7106589), (7, 3045681), (9, 2368863), (19, 1122093), (21, 1015227), (27, 789621), (57, 374031), (63, 338409), (81, 263207), (133, 160299), (171, 124677), (189, 112803), (399, 53433), (513, 41559), (567, 37601), (1197, 17811), (1539, 13853), (1979, 10773), (3591, 5937)]