21453560

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12473}}^1$

素因数の和:12527

約数の個数: 32

約数和(自身を含む): 49397040

約数和(自身を除く): 27943480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12473, 24946, 49892, 62365, 99784, 124730, 249460, 498920, 536339, 1072678, 2145356, 2681695, 4290712, 5363390, 10726780, 21453560]

約数ペア:

[(1, 21453560), (2, 10726780), (4, 5363390), (5, 4290712), (8, 2681695), (10, 2145356), (20, 1072678), (40, 536339), (43, 498920), (86, 249460), (172, 124730), (215, 99784), (344, 62365), (430, 49892), (860, 24946), (1720, 12473)]