20717440

素因数分解:

$2^7\times 5^1\times {\mathrm{32371}}^1$

素因数の和:32390

約数の個数: 32

約数和(自身を含む): 49529160

約数和(自身を除く): 28811720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32371, 64742, 129484, 161855, 258968, 323710, 517936, 647420, 1035872, 1294840, 2071744, 2589680, 4143488, 5179360, 10358720, 20717440]

約数ペア:

[(1, 20717440), (2, 10358720), (4, 5179360), (5, 4143488), (8, 2589680), (10, 2071744), (16, 1294840), (20, 1035872), (32, 647420), (40, 517936), (64, 323710), (80, 258968), (128, 161855), (160, 129484), (320, 64742), (640, 32371)]