27720920

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{16903}}^1$

素因数の和:16955

約数の個数: 32

約数和(自身を含む): 63897120

約数和(自身を除く): 36176200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 16903, 33806, 67612, 84515, 135224, 169030, 338060, 676120, 693023, 1386046, 2772092, 3465115, 5544184, 6930230, 13860460, 27720920]

約数ペア:

[(1, 27720920), (2, 13860460), (4, 6930230), (5, 5544184), (8, 3465115), (10, 2772092), (20, 1386046), (40, 693023), (41, 676120), (82, 338060), (164, 169030), (205, 135224), (328, 84515), (410, 67612), (820, 33806), (1640, 16903)]