13121980

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{811}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 27624240

約数和(自身を除く): 14502260

約数列:

[1, 2, 4, 5, 10, 20, 809, 811, 1618, 1622, 3236, 3244, 4045, 4055, 8090, 8110, 16180, 16220, 656099, 1312198, 2624396, 3280495, 6560990, 13121980]

約数ペア:

[(1, 13121980), (2, 6560990), (4, 3280495), (5, 2624396), (10, 1312198), (20, 656099), (809, 16220), (811, 16180), (1618, 8110), (1622, 8090), (3236, 4055), (3244, 4045)]