20509740

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1999}}^1$

素因数の和:2036

約数の個数: 96

約数和(自身を含む): 67200000

約数和(自身を除く): 46690260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 90, 95, 108, 114, 135, 171, 180, 190, 228, 270, 285, 342, 380, 513, 540, 570, 684, 855, 1026, 1140, 1710, 1999, 2052, 2565, 3420, 3998, 5130, 5997, 7996, 9995, 10260, 11994, 17991, 19990, 23988, 29985, 35982, 37981, 39980, 53973, 59970, 71964, 75962, 89955, 107946, 113943, 119940, 151924, 179910, 189905, 215892, 227886, 269865, 341829, 359820, 379810, 455772, 539730, 569715, 683658, 759620, 1025487, 1079460, 1139430, 1367316, 1709145, 2050974, 2278860, 3418290, 4101948, 5127435, 6836580, 10254870, 20509740]

約数ペア:

[(1, 20509740), (2, 10254870), (3, 6836580), (4, 5127435), (5, 4101948), (6, 3418290), (9, 2278860), (10, 2050974), (12, 1709145), (15, 1367316), (18, 1139430), (19, 1079460), (20, 1025487), (27, 759620), (30, 683658), (36, 569715), (38, 539730), (45, 455772), (54, 379810), (57, 359820), (60, 341829), (76, 269865), (90, 227886), (95, 215892), (108, 189905), (114, 179910), (135, 151924), (171, 119940), (180, 113943), (190, 107946), (228, 89955), (270, 75962), (285, 71964), (342, 59970), (380, 53973), (513, 39980), (540, 37981), (570, 35982), (684, 29985), (855, 23988), (1026, 19990), (1140, 17991), (1710, 11994), (1999, 10260), (2052, 9995), (2565, 7996), (3420, 5997), (3998, 5130)]