21552640

素因数分解:

$2^9\times 5^1\times {\mathrm{8419}}^1$

素因数の和:8442

約数の個数: 40

約数和(自身を含む): 51681960

約数和(自身を除く): 30129320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8419, 16838, 33676, 42095, 67352, 84190, 134704, 168380, 269408, 336760, 538816, 673520, 1077632, 1347040, 2155264, 2694080, 4310528, 5388160, 10776320, 21552640]

約数ペア:

[(1, 21552640), (2, 10776320), (4, 5388160), (5, 4310528), (8, 2694080), (10, 2155264), (16, 1347040), (20, 1077632), (32, 673520), (40, 538816), (64, 336760), (80, 269408), (128, 168380), (160, 134704), (256, 84190), (320, 67352), (512, 42095), (640, 33676), (1280, 16838), (2560, 8419)]