21306888

素因数分解:

$2^3\times 3^4\times {\mathrm{131}}^1\times {\mathrm{251}}^1$

素因数の和:400

約数の個数: 80

約数和(自身を含む): 60374160

約数和(自身を除く): 39067272

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 131, 162, 216, 251, 262, 324, 393, 502, 524, 648, 753, 786, 1004, 1048, 1179, 1506, 1572, 2008, 2259, 2358, 3012, 3144, 3537, 4518, 4716, 6024, 6777, 7074, 9036, 9432, 10611, 13554, 14148, 18072, 20331, 21222, 27108, 28296, 32881, 40662, 42444, 54216, 65762, 81324, 84888, 98643, 131524, 162648, 197286, 263048, 295929, 394572, 591858, 789144, 887787, 1183716, 1775574, 2367432, 2663361, 3551148, 5326722, 7102296, 10653444, 21306888]

約数ペア:

[(1, 21306888), (2, 10653444), (3, 7102296), (4, 5326722), (6, 3551148), (8, 2663361), (9, 2367432), (12, 1775574), (18, 1183716), (24, 887787), (27, 789144), (36, 591858), (54, 394572), (72, 295929), (81, 263048), (108, 197286), (131, 162648), (162, 131524), (216, 98643), (251, 84888), (262, 81324), (324, 65762), (393, 54216), (502, 42444), (524, 40662), (648, 32881), (753, 28296), (786, 27108), (1004, 21222), (1048, 20331), (1179, 18072), (1506, 14148), (1572, 13554), (2008, 10611), (2259, 9432), (2358, 9036), (3012, 7074), (3144, 6777), (3537, 6024), (4518, 4716)]