19620680

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{983}}^1$

素因数の和:1493

約数の個数: 32

約数和(自身を含む): 44280000

約数和(自身を除く): 24659320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 983, 998, 1966, 1996, 2495, 3932, 3992, 4915, 4990, 7864, 9830, 9980, 19660, 19960, 39320, 490517, 981034, 1962068, 2452585, 3924136, 4905170, 9810340, 19620680]

約数ペア:

[(1, 19620680), (2, 9810340), (4, 4905170), (5, 3924136), (8, 2452585), (10, 1962068), (20, 981034), (40, 490517), (499, 39320), (983, 19960), (998, 19660), (1966, 9980), (1996, 9830), (2495, 7864), (3932, 4990), (3992, 4915)]