64840240

素因数分解:

$2^4\times 5^1\times {\mathrm{810503}}^1$

素因数の和:810516

約数の個数: 20

約数和(自身を含む): 150753744

約数和(自身を除く): 85913504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810503, 1621006, 3242012, 4052515, 6484024, 8105030, 12968048, 16210060, 32420120, 64840240]

約数ペア:

[(1, 64840240), (2, 32420120), (4, 16210060), (5, 12968048), (8, 8105030), (10, 6484024), (16, 4052515), (20, 3242012), (40, 1621006), (80, 810503)]