20605280

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1447}}^1$

素因数の和:1551

約数の個数: 48

約数和(自身を含む): 49260960

約数和(自身を除く): 28655680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1447, 1780, 2848, 2894, 3560, 5788, 7120, 7235, 11576, 14240, 14470, 23152, 28940, 46304, 57880, 115760, 128783, 231520, 257566, 515132, 643915, 1030264, 1287830, 2060528, 2575660, 4121056, 5151320, 10302640, 20605280]

約数ペア:

[(1, 20605280), (2, 10302640), (4, 5151320), (5, 4121056), (8, 2575660), (10, 2060528), (16, 1287830), (20, 1030264), (32, 643915), (40, 515132), (80, 257566), (89, 231520), (160, 128783), (178, 115760), (356, 57880), (445, 46304), (712, 28940), (890, 23152), (1424, 14470), (1447, 14240), (1780, 11576), (2848, 7235), (2894, 7120), (3560, 5788)]