81779440

素因数分解:

$2^4\times 5^1\times {\mathrm{1022243}}^1$

素因数の和:1022256

約数の個数: 20

約数和(自身を含む): 190137384

約数和(自身を除く): 108357944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022243, 2044486, 4088972, 5111215, 8177944, 10222430, 16355888, 20444860, 40889720, 81779440]

約数ペア:

[(1, 81779440), (2, 40889720), (4, 20444860), (5, 16355888), (8, 10222430), (10, 8177944), (16, 5111215), (20, 4088972), (40, 2044486), (80, 1022243)]