138509440

素因数分解:

$2^7\times 5^1\times {\mathrm{216421}}^1$

素因数の和:216440

約数の個数: 32

約数和(自身を含む): 331125660

約数和(自身を除く): 192616220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 216421, 432842, 865684, 1082105, 1731368, 2164210, 3462736, 4328420, 6925472, 8656840, 13850944, 17313680, 27701888, 34627360, 69254720, 138509440]

約数ペア:

[(1, 138509440), (2, 69254720), (4, 34627360), (5, 27701888), (8, 17313680), (10, 13850944), (16, 8656840), (20, 6925472), (32, 4328420), (40, 3462736), (64, 2164210), (80, 1731368), (128, 1082105), (160, 865684), (320, 432842), (640, 216421)]