207920840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{126781}}^1$

素因数の和:126833

約数の個数: 32

約数和(自身を含む): 479235960

約数和(自身を除く): 271315120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 126781, 253562, 507124, 633905, 1014248, 1267810, 2535620, 5071240, 5198021, 10396042, 20792084, 25990105, 41584168, 51980210, 103960420, 207920840]

約数ペア:

[(1, 207920840), (2, 103960420), (4, 51980210), (5, 41584168), (8, 25990105), (10, 20792084), (20, 10396042), (40, 5198021), (41, 5071240), (82, 2535620), (164, 1267810), (205, 1014248), (328, 633905), (410, 507124), (820, 253562), (1640, 126781)]