81909680

素因数分解:

$2^4\times 5^1\times {\mathrm{1023871}}^1$

素因数の和:1023884

約数の個数: 20

約数和(自身を含む): 190440192

約数和(自身を除く): 108530512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1023871, 2047742, 4095484, 5119355, 8190968, 10238710, 16381936, 20477420, 40954840, 81909680]

約数ペア:

[(1, 81909680), (2, 40954840), (4, 20477420), (5, 16381936), (8, 10238710), (10, 8190968), (16, 5119355), (20, 4095484), (40, 2047742), (80, 1023871)]