19771720

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{21491}}^1$

素因数の和:21525

約数の個数: 32

約数和(自身を含む): 46422720

約数和(自身を除く): 26651000

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 21491, 42982, 85964, 107455, 171928, 214910, 429820, 494293, 859640, 988586, 1977172, 2471465, 3954344, 4942930, 9885860, 19771720]

約数ペア:

[(1, 19771720), (2, 9885860), (4, 4942930), (5, 3954344), (8, 2471465), (10, 1977172), (20, 988586), (23, 859640), (40, 494293), (46, 429820), (92, 214910), (115, 171928), (184, 107455), (230, 85964), (460, 42982), (920, 21491)]