19421720

素因数分解:

$2^3\times 5^1\times {\mathrm{485543}}^1$

素因数の和:485554

約数の個数: 16

約数和(自身を含む): 43698960

約数和(自身を除く): 24277240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 485543, 971086, 1942172, 2427715, 3884344, 4855430, 9710860, 19421720]

約数ペア:

[(1, 19421720), (2, 9710860), (4, 4855430), (5, 3884344), (8, 2427715), (10, 1942172), (20, 971086), (40, 485543)]