642800

素因数分解:

$2^4\times 5^2\times {\mathrm{1607}}^1$

素因数の和:1625

約数の個数: 30

約数和(自身を含む): 1545288

約数和(自身を除く): 902488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 1607, 3214, 6428, 8035, 12856, 16070, 25712, 32140, 40175, 64280, 80350, 128560, 160700, 321400, 642800]

約数ペア:

[(1, 642800), (2, 321400), (4, 160700), (5, 128560), (8, 80350), (10, 64280), (16, 40175), (20, 32140), (25, 25712), (40, 16070), (50, 12856), (80, 8035), (100, 6428), (200, 3214), (400, 1607)]