21717440

素因数分解:

$2^6\times 5^1\times {\mathrm{67867}}^1$

素因数の和:67884

約数の個数: 28

約数和(自身を含む): 51715416

約数和(自身を除く): 29997976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67867, 135734, 271468, 339335, 542936, 678670, 1085872, 1357340, 2171744, 2714680, 4343488, 5429360, 10858720, 21717440]

約数ペア:

[(1, 21717440), (2, 10858720), (4, 5429360), (5, 4343488), (8, 2714680), (10, 2171744), (16, 1357340), (20, 1085872), (32, 678670), (40, 542936), (64, 339335), (80, 271468), (160, 135734), (320, 67867)]