20131720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71899}}^1$

素因数の和:71917

約数の個数: 32

約数和(自身を含む): 51768000

約数和(自身を除く): 31636280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71899, 143798, 287596, 359495, 503293, 575192, 718990, 1006586, 1437980, 2013172, 2516465, 2875960, 4026344, 5032930, 10065860, 20131720]

約数ペア:

[(1, 20131720), (2, 10065860), (4, 5032930), (5, 4026344), (7, 2875960), (8, 2516465), (10, 2013172), (14, 1437980), (20, 1006586), (28, 718990), (35, 575192), (40, 503293), (56, 359495), (70, 287596), (140, 143798), (280, 71899)]