28891180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{16231}}^1$

素因数の和:16329

約数の個数: 24

約数和(自身を含む): 61356960

約数和(自身を除く): 32465780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 16231, 32462, 64924, 81155, 162310, 324620, 1444559, 2889118, 5778236, 7222795, 14445590, 28891180]

約数ペア:

[(1, 28891180), (2, 14445590), (4, 7222795), (5, 5778236), (10, 2889118), (20, 1444559), (89, 324620), (178, 162310), (356, 81155), (445, 64924), (890, 32462), (1780, 16231)]