20689785

素因数分解:

$3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1789}}^1$

素因数の和:2057

約数の個数: 24

約数和(自身を含む): 36021960

約数和(自身を除く): 15332175

約数列:

[1, 3, 5, 9, 15, 45, 257, 771, 1285, 1789, 2313, 3855, 5367, 8945, 11565, 16101, 26835, 80505, 459773, 1379319, 2298865, 4137957, 6896595, 20689785]

約数ペア:

[(1, 20689785), (3, 6896595), (5, 4137957), (9, 2298865), (15, 1379319), (45, 459773), (257, 80505), (771, 26835), (1285, 16101), (1789, 11565), (2313, 8945), (3855, 5367)]