19844680

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1213}}^1$

素因数の和:1633

約数の個数: 32

約数和(自身を含む): 44796600

約数和(自身を除く): 24951920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1213, 1636, 2045, 2426, 3272, 4090, 4852, 6065, 8180, 9704, 12130, 16360, 24260, 48520, 496117, 992234, 1984468, 2480585, 3968936, 4961170, 9922340, 19844680]

約数ペア:

[(1, 19844680), (2, 9922340), (4, 4961170), (5, 3968936), (8, 2480585), (10, 1984468), (20, 992234), (40, 496117), (409, 48520), (818, 24260), (1213, 16360), (1636, 12130), (2045, 9704), (2426, 8180), (3272, 6065), (4090, 4852)]