20778520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74209}}^1$

素因数の和:74227

約数の個数: 32

約数和(自身を含む): 53431200

約数和(自身を除く): 32652680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74209, 148418, 296836, 371045, 519463, 593672, 742090, 1038926, 1484180, 2077852, 2597315, 2968360, 4155704, 5194630, 10389260, 20778520]

約数ペア:

[(1, 20778520), (2, 10389260), (4, 5194630), (5, 4155704), (7, 2968360), (8, 2597315), (10, 2077852), (14, 1484180), (20, 1038926), (28, 742090), (35, 593672), (40, 519463), (56, 371045), (70, 296836), (140, 148418), (280, 74209)]