21289785

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6791}}^1$

素因数の和:6829

約数の個数: 32

約数和(自身を含む): 39121920

約数和(自身を除く): 17832135

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6791, 20373, 33955, 74701, 101865, 129029, 224103, 373505, 387087, 645145, 1120515, 1419319, 1935435, 4257957, 7096595, 21289785]

約数ペア:

[(1, 21289785), (3, 7096595), (5, 4257957), (11, 1935435), (15, 1419319), (19, 1120515), (33, 645145), (55, 387087), (57, 373505), (95, 224103), (165, 129029), (209, 101865), (285, 74701), (627, 33955), (1045, 20373), (3135, 6791)]