21245077

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{2693}}^1$

素因数の和:2737

約数の個数: 16

約数和(自身を含む): 25862400

約数和(自身を除く): 4617323

約数列:

[1, 7, 23, 49, 161, 343, 1127, 2693, 7889, 18851, 61939, 131957, 433573, 923699, 3035011, 21245077]

約数ペア:

[(1, 21245077), (7, 3035011), (23, 923699), (49, 433573), (161, 131957), (343, 61939), (1127, 18851), (2693, 7889)]