21256360

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2383}}^1$

素因数の和:2617

約数の個数: 32

約数和(自身を含む): 48061440

約数和(自身を除く): 26805080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 2383, 4460, 4766, 8920, 9532, 11915, 19064, 23830, 47660, 95320, 531409, 1062818, 2125636, 2657045, 4251272, 5314090, 10628180, 21256360]

約数ペア:

[(1, 21256360), (2, 10628180), (4, 5314090), (5, 4251272), (8, 2657045), (10, 2125636), (20, 1062818), (40, 531409), (223, 95320), (446, 47660), (892, 23830), (1115, 19064), (1784, 11915), (2230, 9532), (2383, 8920), (4460, 4766)]