21653480

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{829}}^1$

素因数の和:1493

約数の個数: 32

約数和(自身を含む): 48853800

約数和(自身を除く): 27200320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 829, 1306, 1658, 2612, 3265, 3316, 4145, 5224, 6530, 6632, 8290, 13060, 16580, 26120, 33160, 541337, 1082674, 2165348, 2706685, 4330696, 5413370, 10826740, 21653480]

約数ペア:

[(1, 21653480), (2, 10826740), (4, 5413370), (5, 4330696), (8, 2706685), (10, 2165348), (20, 1082674), (40, 541337), (653, 33160), (829, 26120), (1306, 16580), (1658, 13060), (2612, 8290), (3265, 6632), (3316, 6530), (4145, 5224)]