19989180

素因数分解:

$2^2\times 3^7\times 5^1\times {\mathrm{457}}^1$

素因数の和:487

約数の個数: 96

約数和(自身を含む): 63094080

約数和(自身を除く): 43104900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 457, 486, 540, 729, 810, 914, 972, 1215, 1371, 1458, 1620, 1828, 2187, 2285, 2430, 2742, 2916, 3645, 4113, 4374, 4570, 4860, 5484, 6855, 7290, 8226, 8748, 9140, 10935, 12339, 13710, 14580, 16452, 20565, 21870, 24678, 27420, 37017, 41130, 43740, 49356, 61695, 74034, 82260, 111051, 123390, 148068, 185085, 222102, 246780, 333153, 370170, 444204, 555255, 666306, 740340, 999459, 1110510, 1332612, 1665765, 1998918, 2221020, 3331530, 3997836, 4997295, 6663060, 9994590, 19989180]

約数ペア:

[(1, 19989180), (2, 9994590), (3, 6663060), (4, 4997295), (5, 3997836), (6, 3331530), (9, 2221020), (10, 1998918), (12, 1665765), (15, 1332612), (18, 1110510), (20, 999459), (27, 740340), (30, 666306), (36, 555255), (45, 444204), (54, 370170), (60, 333153), (81, 246780), (90, 222102), (108, 185085), (135, 148068), (162, 123390), (180, 111051), (243, 82260), (270, 74034), (324, 61695), (405, 49356), (457, 43740), (486, 41130), (540, 37017), (729, 27420), (810, 24678), (914, 21870), (972, 20565), (1215, 16452), (1371, 14580), (1458, 13710), (1620, 12339), (1828, 10935), (2187, 9140), (2285, 8748), (2430, 8226), (2742, 7290), (2916, 6855), (3645, 5484), (4113, 4860), (4374, 4570)]