21017241

素因数分解:

$3^2\times 7^1\times {\mathrm{449}}^1\times {\mathrm{743}}^1$

素因数の和:1205

約数の個数: 24

約数和(自身を含む): 34819200

約数和(自身を除く): 13801959

約数列:

[1, 3, 7, 9, 21, 63, 449, 743, 1347, 2229, 3143, 4041, 5201, 6687, 9429, 15603, 28287, 46809, 333607, 1000821, 2335249, 3002463, 7005747, 21017241]

約数ペア:

[(1, 21017241), (3, 7005747), (7, 3002463), (9, 2335249), (21, 1000821), (63, 333607), (449, 46809), (743, 28287), (1347, 15603), (2229, 9429), (3143, 6687), (4041, 5201)]