19516520

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1229}}^1$

素因数の和:1637

約数の個数: 32

約数和(自身を含む): 44058600

約数和(自身を除く): 24542080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1229, 1588, 1985, 2458, 3176, 3970, 4916, 6145, 7940, 9832, 12290, 15880, 24580, 49160, 487913, 975826, 1951652, 2439565, 3903304, 4879130, 9758260, 19516520]

約数ペア:

[(1, 19516520), (2, 9758260), (4, 4879130), (5, 3903304), (8, 2439565), (10, 1951652), (20, 975826), (40, 487913), (397, 49160), (794, 24580), (1229, 15880), (1588, 12290), (1985, 9832), (2458, 7940), (3176, 6145), (3970, 4916)]