20403960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{193}}^1\times {\mathrm{881}}^1$

素因数の和:1088

約数の個数: 64

約数和(自身を含む): 61598880

約数和(自身を除く): 41194920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 193, 386, 579, 772, 881, 965, 1158, 1544, 1762, 1930, 2316, 2643, 2895, 3524, 3860, 4405, 4632, 5286, 5790, 7048, 7720, 8810, 10572, 11580, 13215, 17620, 21144, 23160, 26430, 35240, 52860, 105720, 170033, 340066, 510099, 680132, 850165, 1020198, 1360264, 1700330, 2040396, 2550495, 3400660, 4080792, 5100990, 6801320, 10201980, 20403960]

約数ペア:

[(1, 20403960), (2, 10201980), (3, 6801320), (4, 5100990), (5, 4080792), (6, 3400660), (8, 2550495), (10, 2040396), (12, 1700330), (15, 1360264), (20, 1020198), (24, 850165), (30, 680132), (40, 510099), (60, 340066), (120, 170033), (193, 105720), (386, 52860), (579, 35240), (772, 26430), (881, 23160), (965, 21144), (1158, 17620), (1544, 13215), (1762, 11580), (1930, 10572), (2316, 8810), (2643, 7720), (2895, 7048), (3524, 5790), (3860, 5286), (4405, 4632)]