21807540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1249}}^1$

素因数の和:1361

約数の個数: 72

約数和(自身を含む): 66885000

約数和(自身を除く): 45077460

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 97, 180, 194, 291, 388, 485, 582, 873, 970, 1164, 1249, 1455, 1746, 1940, 2498, 2910, 3492, 3747, 4365, 4996, 5820, 6245, 7494, 8730, 11241, 12490, 14988, 17460, 18735, 22482, 24980, 37470, 44964, 56205, 74940, 112410, 121153, 224820, 242306, 363459, 484612, 605765, 726918, 1090377, 1211530, 1453836, 1817295, 2180754, 2423060, 3634590, 4361508, 5451885, 7269180, 10903770, 21807540]

約数ペア:

[(1, 21807540), (2, 10903770), (3, 7269180), (4, 5451885), (5, 4361508), (6, 3634590), (9, 2423060), (10, 2180754), (12, 1817295), (15, 1453836), (18, 1211530), (20, 1090377), (30, 726918), (36, 605765), (45, 484612), (60, 363459), (90, 242306), (97, 224820), (180, 121153), (194, 112410), (291, 74940), (388, 56205), (485, 44964), (582, 37470), (873, 24980), (970, 22482), (1164, 18735), (1249, 17460), (1455, 14988), (1746, 12490), (1940, 11241), (2498, 8730), (2910, 7494), (3492, 6245), (3747, 5820), (4365, 4996)]