138826880

素因数分解:

$2^7\times 5^1\times {\mathrm{216917}}^1$

素因数の和:216936

約数の個数: 32

約数和(自身を含む): 331884540

約数和(自身を除く): 193057660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 216917, 433834, 867668, 1084585, 1735336, 2169170, 3470672, 4338340, 6941344, 8676680, 13882688, 17353360, 27765376, 34706720, 69413440, 138826880]

約数ペア:

[(1, 138826880), (2, 69413440), (4, 34706720), (5, 27765376), (8, 17353360), (10, 13882688), (16, 8676680), (20, 6941344), (32, 4338340), (40, 3470672), (64, 2169170), (80, 1735336), (128, 1084585), (160, 867668), (320, 433834), (640, 216917)]