20123140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23399}}^1$

素因数の和:23451

約数の個数: 24

約数和(自身を含む): 43243200

約数和(自身を除く): 23120060

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23399, 46798, 93596, 116995, 233990, 467980, 1006157, 2012314, 4024628, 5030785, 10061570, 20123140]

約数ペア:

[(1, 20123140), (2, 10061570), (4, 5030785), (5, 4024628), (10, 2012314), (20, 1006157), (43, 467980), (86, 233990), (172, 116995), (215, 93596), (430, 46798), (860, 23399)]