18985480

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5333}}^1$

素因数の和:5433

約数の個数: 32

約数和(自身を含む): 43205400

約数和(自身を除く): 24219920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5333, 10666, 21332, 26665, 42664, 53330, 106660, 213320, 474637, 949274, 1898548, 2373185, 3797096, 4746370, 9492740, 18985480]

約数ペア:

[(1, 18985480), (2, 9492740), (4, 4746370), (5, 3797096), (8, 2373185), (10, 1898548), (20, 949274), (40, 474637), (89, 213320), (178, 106660), (356, 53330), (445, 42664), (712, 26665), (890, 21332), (1780, 10666), (3560, 5333)]