20521695

素因数分解:

$3^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{3517}}^1$

素因数の和:3914

約数の個数: 16

約数和(自身を含む): 32928480

約数和(自身を除く): 12406785

約数列:

[1, 3, 5, 15, 389, 1167, 1945, 3517, 5835, 10551, 17585, 52755, 1368113, 4104339, 6840565, 20521695]

約数ペア:

[(1, 20521695), (3, 6840565), (5, 4104339), (15, 1368113), (389, 52755), (1167, 17585), (1945, 10551), (3517, 5835)]