15641720

素因数分解:

$2^3\times 5^1\times {\mathrm{383}}^1\times {\mathrm{1021}}^1$

素因数の和:1415

約数の個数: 32

約数和(自身を含む): 35320320

約数和(自身を除く): 19678600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 383, 766, 1021, 1532, 1915, 2042, 3064, 3830, 4084, 5105, 7660, 8168, 10210, 15320, 20420, 40840, 391043, 782086, 1564172, 1955215, 3128344, 3910430, 7820860, 15641720]

約数ペア:

[(1, 15641720), (2, 7820860), (4, 3910430), (5, 3128344), (8, 1955215), (10, 1564172), (20, 782086), (40, 391043), (383, 40840), (766, 20420), (1021, 15320), (1532, 10210), (1915, 8168), (2042, 7660), (3064, 5105), (3830, 4084)]