19966120

素因数分解:

$2^3\times 5^1\times {\mathrm{617}}^1\times {\mathrm{809}}^1$

素因数の和:1437

約数の個数: 32

約数和(自身を含む): 45052200

約数和(自身を除く): 25086080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 617, 809, 1234, 1618, 2468, 3085, 3236, 4045, 4936, 6170, 6472, 8090, 12340, 16180, 24680, 32360, 499153, 998306, 1996612, 2495765, 3993224, 4991530, 9983060, 19966120]

約数ペア:

[(1, 19966120), (2, 9983060), (4, 4991530), (5, 3993224), (8, 2495765), (10, 1996612), (20, 998306), (40, 499153), (617, 32360), (809, 24680), (1234, 16180), (1618, 12340), (2468, 8090), (3085, 6472), (3236, 6170), (4045, 4936)]