20322680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{401}}^1$

素因数の和:600

約数の個数: 64

約数和(自身を含む): 52678080

約数和(自身を除く): 32355400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 181, 280, 362, 401, 724, 802, 905, 1267, 1448, 1604, 1810, 2005, 2534, 2807, 3208, 3620, 4010, 5068, 5614, 6335, 7240, 8020, 10136, 11228, 12670, 14035, 16040, 22456, 25340, 28070, 50680, 56140, 72581, 112280, 145162, 290324, 362905, 508067, 580648, 725810, 1016134, 1451620, 2032268, 2540335, 2903240, 4064536, 5080670, 10161340, 20322680]

約数ペア:

[(1, 20322680), (2, 10161340), (4, 5080670), (5, 4064536), (7, 2903240), (8, 2540335), (10, 2032268), (14, 1451620), (20, 1016134), (28, 725810), (35, 580648), (40, 508067), (56, 362905), (70, 290324), (140, 145162), (181, 112280), (280, 72581), (362, 56140), (401, 50680), (724, 28070), (802, 25340), (905, 22456), (1267, 16040), (1448, 14035), (1604, 12670), (1810, 11228), (2005, 10136), (2534, 8020), (2807, 7240), (3208, 6335), (3620, 5614), (4010, 5068)]