21516516

素因数分解:

$2^2\times 3^4\times 7^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:255

約数の個数: 120

約数和(自身を含む): 65862720

約数和(自身を除く): 44346204

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 53, 54, 63, 81, 84, 106, 108, 126, 159, 162, 179, 189, 212, 252, 318, 324, 358, 371, 378, 477, 537, 567, 636, 716, 742, 756, 954, 1074, 1113, 1134, 1253, 1431, 1484, 1611, 1908, 2148, 2226, 2268, 2506, 2862, 3222, 3339, 3759, 4293, 4452, 4833, 5012, 5724, 6444, 6678, 7518, 8586, 9487, 9666, 10017, 11277, 13356, 14499, 15036, 17172, 18974, 19332, 20034, 22554, 28461, 28998, 30051, 33831, 37948, 40068, 45108, 56922, 57996, 60102, 66409, 67662, 85383, 101493, 113844, 120204, 132818, 135324, 170766, 199227, 202986, 256149, 265636, 341532, 398454, 405972, 512298, 597681, 768447, 796908, 1024596, 1195362, 1536894, 1793043, 2390724, 3073788, 3586086, 5379129, 7172172, 10758258, 21516516]

約数ペア:

[(1, 21516516), (2, 10758258), (3, 7172172), (4, 5379129), (6, 3586086), (7, 3073788), (9, 2390724), (12, 1793043), (14, 1536894), (18, 1195362), (21, 1024596), (27, 796908), (28, 768447), (36, 597681), (42, 512298), (53, 405972), (54, 398454), (63, 341532), (81, 265636), (84, 256149), (106, 202986), (108, 199227), (126, 170766), (159, 135324), (162, 132818), (179, 120204), (189, 113844), (212, 101493), (252, 85383), (318, 67662), (324, 66409), (358, 60102), (371, 57996), (378, 56922), (477, 45108), (537, 40068), (567, 37948), (636, 33831), (716, 30051), (742, 28998), (756, 28461), (954, 22554), (1074, 20034), (1113, 19332), (1134, 18974), (1253, 17172), (1431, 15036), (1484, 14499), (1611, 13356), (1908, 11277), (2148, 10017), (2226, 9666), (2268, 9487), (2506, 8586), (2862, 7518), (3222, 6678), (3339, 6444), (3759, 5724), (4293, 5012), (4452, 4833)]