128216020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{156361}}^1$

素因数の和:156411

約数の個数: 24

約数和(自身を含む): 275822568

約数和(自身を除く): 147606548

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 156361, 312722, 625444, 781805, 1563610, 3127220, 6410801, 12821602, 25643204, 32054005, 64108010, 128216020]

約数ペア:

[(1, 128216020), (2, 64108010), (4, 32054005), (5, 25643204), (10, 12821602), (20, 6410801), (41, 3127220), (82, 1563610), (164, 781805), (205, 625444), (410, 312722), (820, 156361)]