81221940

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{277}}^1$

素因数の和:479

約数の個数: 120

約数和(自身を含む): 257128872

約数和(自身を除く): 175906932

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, 181, 270, 277, 324, 362, 405, 540, 543, 554, 724, 810, 831, 905, 1086, 1108, 1385, 1620, 1629, 1662, 1810, 2172, 2493, 2715, 2770, 3258, 3324, 3620, 4155, 4887, 4986, 5430, 5540, 6516, 7479, 8145, 8310, 9774, 9972, 10860, 12465, 14661, 14958, 16290, 16620, 19548, 22437, 24435, 24930, 29322, 29916, 32580, 37395, 44874, 48870, 49860, 50137, 58644, 73305, 74790, 89748, 97740, 100274, 112185, 146610, 149580, 150411, 200548, 224370, 250685, 293220, 300822, 448740, 451233, 501370, 601644, 752055, 902466, 1002740, 1353699, 1504110, 1804932, 2256165, 2707398, 3008220, 4061097, 4512330, 5414796, 6768495, 8122194, 9024660, 13536990, 16244388, 20305485, 27073980, 40610970, 81221940]

約数ペア:

[(1, 81221940), (2, 40610970), (3, 27073980), (4, 20305485), (5, 16244388), (6, 13536990), (9, 9024660), (10, 8122194), (12, 6768495), (15, 5414796), (18, 4512330), (20, 4061097), (27, 3008220), (30, 2707398), (36, 2256165), (45, 1804932), (54, 1504110), (60, 1353699), (81, 1002740), (90, 902466), (108, 752055), (135, 601644), (162, 501370), (180, 451233), (181, 448740), (270, 300822), (277, 293220), (324, 250685), (362, 224370), (405, 200548), (540, 150411), (543, 149580), (554, 146610), (724, 112185), (810, 100274), (831, 97740), (905, 89748), (1086, 74790), (1108, 73305), (1385, 58644), (1620, 50137), (1629, 49860), (1662, 48870), (1810, 44874), (2172, 37395), (2493, 32580), (2715, 29916), (2770, 29322), (3258, 24930), (3324, 24435), (3620, 22437), (4155, 19548), (4887, 16620), (4986, 16290), (5430, 14958), (5540, 14661), (6516, 12465), (7479, 10860), (8145, 9972), (8310, 9774)]