20939760

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{229}}^1$

素因数の和:375

約数の個数: 120

約数和(自身を含む): 71185920

約数和(自身を除く): 50246160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 127, 144, 180, 229, 240, 254, 360, 381, 458, 508, 635, 687, 720, 762, 916, 1016, 1143, 1145, 1270, 1374, 1524, 1832, 1905, 2032, 2061, 2286, 2290, 2540, 2748, 3048, 3435, 3664, 3810, 4122, 4572, 4580, 5080, 5496, 5715, 6096, 6870, 7620, 8244, 9144, 9160, 10160, 10305, 10992, 11430, 13740, 15240, 16488, 18288, 18320, 20610, 22860, 27480, 29083, 30480, 32976, 41220, 45720, 54960, 58166, 82440, 87249, 91440, 116332, 145415, 164880, 174498, 232664, 261747, 290830, 348996, 436245, 465328, 523494, 581660, 697992, 872490, 1046988, 1163320, 1308735, 1395984, 1744980, 2093976, 2326640, 2617470, 3489960, 4187952, 5234940, 6979920, 10469880, 20939760]

約数ペア:

[(1, 20939760), (2, 10469880), (3, 6979920), (4, 5234940), (5, 4187952), (6, 3489960), (8, 2617470), (9, 2326640), (10, 2093976), (12, 1744980), (15, 1395984), (16, 1308735), (18, 1163320), (20, 1046988), (24, 872490), (30, 697992), (36, 581660), (40, 523494), (45, 465328), (48, 436245), (60, 348996), (72, 290830), (80, 261747), (90, 232664), (120, 174498), (127, 164880), (144, 145415), (180, 116332), (229, 91440), (240, 87249), (254, 82440), (360, 58166), (381, 54960), (458, 45720), (508, 41220), (635, 32976), (687, 30480), (720, 29083), (762, 27480), (916, 22860), (1016, 20610), (1143, 18320), (1145, 18288), (1270, 16488), (1374, 15240), (1524, 13740), (1832, 11430), (1905, 10992), (2032, 10305), (2061, 10160), (2286, 9160), (2290, 9144), (2540, 8244), (2748, 7620), (3048, 6870), (3435, 6096), (3664, 5715), (3810, 5496), (4122, 5080), (4572, 4580)]