449980

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{151}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 957600

約数和(自身を除く): 507620

約数列:

[1, 2, 4, 5, 10, 20, 149, 151, 298, 302, 596, 604, 745, 755, 1490, 1510, 2980, 3020, 22499, 44998, 89996, 112495, 224990, 449980]

約数ペア:

[(1, 449980), (2, 224990), (4, 112495), (5, 89996), (10, 44998), (20, 22499), (149, 3020), (151, 2980), (298, 1510), (302, 1490), (596, 755), (604, 745)]