81647980

素因数分解:

$2^2\times 5^1\times {\mathrm{983}}^1\times {\mathrm{4153}}^1$

素因数の和:5145

約数の個数: 24

約数和(自身を含む): 171676512

約数和(自身を除く): 90028532

約数列:

[1, 2, 4, 5, 10, 20, 983, 1966, 3932, 4153, 4915, 8306, 9830, 16612, 19660, 20765, 41530, 83060, 4082399, 8164798, 16329596, 20411995, 40823990, 81647980]

約数ペア:

[(1, 81647980), (2, 40823990), (4, 20411995), (5, 16329596), (10, 8164798), (20, 4082399), (983, 83060), (1966, 41530), (3932, 20765), (4153, 19660), (4915, 16612), (8306, 9830)]