20212880

素因数分解:

$2^4\times 5^1\times {\mathrm{307}}^1\times {\mathrm{823}}^1$

素因数の和:1143

約数の個数: 40

約数和(自身を含む): 47205312

約数和(自身を除く): 26992432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 307, 614, 823, 1228, 1535, 1646, 2456, 3070, 3292, 4115, 4912, 6140, 6584, 8230, 12280, 13168, 16460, 24560, 32920, 65840, 252661, 505322, 1010644, 1263305, 2021288, 2526610, 4042576, 5053220, 10106440, 20212880]

約数ペア:

[(1, 20212880), (2, 10106440), (4, 5053220), (5, 4042576), (8, 2526610), (10, 2021288), (16, 1263305), (20, 1010644), (40, 505322), (80, 252661), (307, 65840), (614, 32920), (823, 24560), (1228, 16460), (1535, 13168), (1646, 12280), (2456, 8230), (3070, 6584), (3292, 6140), (4115, 4912)]