21604440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1259}}^1$

素因数の和:1297

約数の個数: 128

約数和(自身を含む): 76204800

約数和(自身を除く): 54600360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1259, 1320, 1430, 1560, 1716, 2145, 2518, 2860, 3432, 3777, 4290, 5036, 5720, 6295, 7554, 8580, 10072, 12590, 13849, 15108, 16367, 17160, 18885, 25180, 27698, 30216, 32734, 37770, 41547, 49101, 50360, 55396, 65468, 69245, 75540, 81835, 83094, 98202, 110792, 130936, 138490, 151080, 163670, 166188, 180037, 196404, 207735, 245505, 276980, 327340, 332376, 360074, 392808, 415470, 491010, 540111, 553960, 654680, 720148, 830940, 900185, 982020, 1080222, 1440296, 1661880, 1800370, 1964040, 2160444, 2700555, 3600740, 4320888, 5401110, 7201480, 10802220, 21604440]

約数ペア:

[(1, 21604440), (2, 10802220), (3, 7201480), (4, 5401110), (5, 4320888), (6, 3600740), (8, 2700555), (10, 2160444), (11, 1964040), (12, 1800370), (13, 1661880), (15, 1440296), (20, 1080222), (22, 982020), (24, 900185), (26, 830940), (30, 720148), (33, 654680), (39, 553960), (40, 540111), (44, 491010), (52, 415470), (55, 392808), (60, 360074), (65, 332376), (66, 327340), (78, 276980), (88, 245505), (104, 207735), (110, 196404), (120, 180037), (130, 166188), (132, 163670), (143, 151080), (156, 138490), (165, 130936), (195, 110792), (220, 98202), (260, 83094), (264, 81835), (286, 75540), (312, 69245), (330, 65468), (390, 55396), (429, 50360), (440, 49101), (520, 41547), (572, 37770), (660, 32734), (715, 30216), (780, 27698), (858, 25180), (1144, 18885), (1259, 17160), (1320, 16367), (1430, 15108), (1560, 13849), (1716, 12590), (2145, 10072), (2518, 8580), (2860, 7554), (3432, 6295), (3777, 5720), (4290, 5036)]