20663937

素因数分解:

$3^3\times 7^2\times {\mathrm{15619}}^1$

素因数の和:15642

約数の個数: 24

約数和(自身を含む): 35613600

約数和(自身を除く): 14949663

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15619, 46857, 109333, 140571, 327999, 421713, 765331, 983997, 2295993, 2951991, 6887979, 20663937]

約数ペア:

[(1, 20663937), (3, 6887979), (7, 2951991), (9, 2295993), (21, 983997), (27, 765331), (49, 421713), (63, 327999), (147, 140571), (189, 109333), (441, 46857), (1323, 15619)]