128548400

素因数分解:

$2^4\times 5^2\times {\mathrm{321371}}^1$

素因数の和:321389

約数の個数: 30

約数和(自身を含む): 308838492

約数和(自身を除く): 180290092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 321371, 642742, 1285484, 1606855, 2570968, 3213710, 5141936, 6427420, 8034275, 12854840, 16068550, 25709680, 32137100, 64274200, 128548400]

約数ペア:

[(1, 128548400), (2, 64274200), (4, 32137100), (5, 25709680), (8, 16068550), (10, 12854840), (16, 8034275), (20, 6427420), (25, 5141936), (40, 3213710), (50, 2570968), (80, 1606855), (100, 1285484), (200, 642742), (400, 321371)]