19728548

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 41112960

約数和(自身を除く): 21384412

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 137, 139, 148, 259, 274, 278, 518, 548, 556, 959, 973, 1036, 1918, 1946, 3836, 3892, 5069, 5143, 10138, 10286, 19043, 20276, 20572, 35483, 36001, 38086, 70966, 72002, 76172, 133301, 141932, 144004, 266602, 533204, 704591, 1409182, 2818364, 4932137, 9864274, 19728548]

約数ペア:

[(1, 19728548), (2, 9864274), (4, 4932137), (7, 2818364), (14, 1409182), (28, 704591), (37, 533204), (74, 266602), (137, 144004), (139, 141932), (148, 133301), (259, 76172), (274, 72002), (278, 70966), (518, 38086), (548, 36001), (556, 35483), (959, 20572), (973, 20276), (1036, 19043), (1918, 10286), (1946, 10138), (3836, 5143), (3892, 5069)]