1640386840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{577601}}^1$

素因数の和:577683

約数の個数: 32

約数和(自身を含む): 3742860960

約数和(自身を除く): 2102474120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 577601, 1155202, 2310404, 2888005, 4620808, 5776010, 11552020, 23104040, 41009671, 82019342, 164038684, 205048355, 328077368, 410096710, 820193420, 1640386840]

約数ペア:

[(1, 1640386840), (2, 820193420), (4, 410096710), (5, 328077368), (8, 205048355), (10, 164038684), (20, 82019342), (40, 41009671), (71, 23104040), (142, 11552020), (284, 5776010), (355, 4620808), (568, 2888005), (710, 2310404), (1420, 1155202), (2840, 577601)]