19648840

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11981}}^1$

素因数の和:12033

約数の個数: 32

約数和(自身を含む): 45291960

約数和(自身を除く): 25643120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11981, 23962, 47924, 59905, 95848, 119810, 239620, 479240, 491221, 982442, 1964884, 2456105, 3929768, 4912210, 9824420, 19648840]

約数ペア:

[(1, 19648840), (2, 9824420), (4, 4912210), (5, 3929768), (8, 2456105), (10, 1964884), (20, 982442), (40, 491221), (41, 479240), (82, 239620), (164, 119810), (205, 95848), (328, 59905), (410, 47924), (820, 23962), (1640, 11981)]