20786480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:139

約数の個数: 160

約数和(自身を含む): 59996160

約数和(自身を除く): 39209680

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 23, 26, 40, 44, 46, 52, 55, 65, 79, 80, 88, 92, 104, 110, 115, 130, 143, 158, 176, 184, 208, 220, 230, 253, 260, 286, 299, 316, 368, 395, 440, 460, 506, 520, 572, 598, 632, 715, 790, 869, 880, 920, 1012, 1027, 1040, 1144, 1196, 1264, 1265, 1430, 1495, 1580, 1738, 1817, 1840, 2024, 2054, 2288, 2392, 2530, 2860, 2990, 3160, 3289, 3476, 3634, 4048, 4108, 4345, 4784, 5060, 5135, 5720, 5980, 6320, 6578, 6952, 7268, 8216, 8690, 9085, 10120, 10270, 11297, 11440, 11960, 13156, 13904, 14536, 16432, 16445, 17380, 18170, 19987, 20240, 20540, 22594, 23621, 23920, 26312, 29072, 32890, 34760, 36340, 39974, 41080, 45188, 47242, 52624, 56485, 65780, 69520, 72680, 79948, 82160, 90376, 94484, 99935, 112970, 118105, 131560, 145360, 159896, 180752, 188968, 199870, 225940, 236210, 259831, 263120, 319792, 377936, 399740, 451880, 472420, 519662, 799480, 903760, 944840, 1039324, 1299155, 1598960, 1889680, 2078648, 2598310, 4157296, 5196620, 10393240, 20786480]

約数ペア:

[(1, 20786480), (2, 10393240), (4, 5196620), (5, 4157296), (8, 2598310), (10, 2078648), (11, 1889680), (13, 1598960), (16, 1299155), (20, 1039324), (22, 944840), (23, 903760), (26, 799480), (40, 519662), (44, 472420), (46, 451880), (52, 399740), (55, 377936), (65, 319792), (79, 263120), (80, 259831), (88, 236210), (92, 225940), (104, 199870), (110, 188968), (115, 180752), (130, 159896), (143, 145360), (158, 131560), (176, 118105), (184, 112970), (208, 99935), (220, 94484), (230, 90376), (253, 82160), (260, 79948), (286, 72680), (299, 69520), (316, 65780), (368, 56485), (395, 52624), (440, 47242), (460, 45188), (506, 41080), (520, 39974), (572, 36340), (598, 34760), (632, 32890), (715, 29072), (790, 26312), (869, 23920), (880, 23621), (920, 22594), (1012, 20540), (1027, 20240), (1040, 19987), (1144, 18170), (1196, 17380), (1264, 16445), (1265, 16432), (1430, 14536), (1495, 13904), (1580, 13156), (1738, 11960), (1817, 11440), (1840, 11297), (2024, 10270), (2054, 10120), (2288, 9085), (2392, 8690), (2530, 8216), (2860, 7268), (2990, 6952), (3160, 6578), (3289, 6320), (3476, 5980), (3634, 5720), (4048, 5135), (4108, 5060), (4345, 4784)]