21330848

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^2\times {\mathrm{787}}^1$

素因数の和:826

約数の個数: 72

約数和(自身を含む): 52821216

約数和(自身を除く): 31490368

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 77, 88, 112, 121, 154, 176, 224, 242, 308, 352, 484, 616, 787, 847, 968, 1232, 1574, 1694, 1936, 2464, 3148, 3388, 3872, 5509, 6296, 6776, 8657, 11018, 12592, 13552, 17314, 22036, 25184, 27104, 34628, 44072, 60599, 69256, 88144, 95227, 121198, 138512, 176288, 190454, 242396, 277024, 380908, 484792, 666589, 761816, 969584, 1333178, 1523632, 1939168, 2666356, 3047264, 5332712, 10665424, 21330848]

約数ペア:

[(1, 21330848), (2, 10665424), (4, 5332712), (7, 3047264), (8, 2666356), (11, 1939168), (14, 1523632), (16, 1333178), (22, 969584), (28, 761816), (32, 666589), (44, 484792), (56, 380908), (77, 277024), (88, 242396), (112, 190454), (121, 176288), (154, 138512), (176, 121198), (224, 95227), (242, 88144), (308, 69256), (352, 60599), (484, 44072), (616, 34628), (787, 27104), (847, 25184), (968, 22036), (1232, 17314), (1574, 13552), (1694, 12592), (1936, 11018), (2464, 8657), (3148, 6776), (3388, 6296), (3872, 5509)]