21339520

素因数分解:

$2^7\times 5^1\times {\mathrm{33343}}^1$

素因数の和:33362

約数の個数: 32

約数和(自身を含む): 51016320

約数和(自身を除く): 29676800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33343, 66686, 133372, 166715, 266744, 333430, 533488, 666860, 1066976, 1333720, 2133952, 2667440, 4267904, 5334880, 10669760, 21339520]

約数ペア:

[(1, 21339520), (2, 10669760), (4, 5334880), (5, 4267904), (8, 2667440), (10, 2133952), (16, 1333720), (20, 1066976), (32, 666860), (40, 533488), (64, 333430), (80, 266744), (128, 166715), (160, 133372), (320, 66686), (640, 33343)]