15840920

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1657}}^1$

素因数の和:1907

約数の個数: 32

約数和(自身を含む): 35812800

約数和(自身を除く): 19971880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1657, 1912, 2390, 3314, 4780, 6628, 8285, 9560, 13256, 16570, 33140, 66280, 396023, 792046, 1584092, 1980115, 3168184, 3960230, 7920460, 15840920]

約数ペア:

[(1, 15840920), (2, 7920460), (4, 3960230), (5, 3168184), (8, 1980115), (10, 1584092), (20, 792046), (40, 396023), (239, 66280), (478, 33140), (956, 16570), (1195, 13256), (1657, 9560), (1912, 8285), (2390, 6628), (3314, 4780)]