21248820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1217}}^1$

素因数の和:1329

約数の個数: 72

約数和(自身を含む): 65172744

約数和(自身を除く): 43923924

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, 1217, 1455, 1746, 1940, 2434, 2910, 3492, 3651, 4365, 4868, 5820, 6085, 7302, 8730, 10953, 12170, 14604, 17460, 18255, 21906, 24340, 36510, 43812, 54765, 73020, 109530, 118049, 219060, 236098, 354147, 472196, 590245, 708294, 1062441, 1180490, 1416588, 1770735, 2124882, 2360980, 3541470, 4249764, 5312205, 7082940, 10624410, 21248820]

約数ペア:

[(1, 21248820), (2, 10624410), (3, 7082940), (4, 5312205), (5, 4249764), (6, 3541470), (9, 2360980), (10, 2124882), (12, 1770735), (15, 1416588), (18, 1180490), (20, 1062441), (30, 708294), (36, 590245), (45, 472196), (60, 354147), (90, 236098), (97, 219060), (180, 118049), (194, 109530), (291, 73020), (388, 54765), (485, 43812), (582, 36510), (873, 24340), (970, 21906), (1164, 18255), (1217, 17460), (1455, 14604), (1746, 12170), (1940, 10953), (2434, 8730), (2910, 7302), (3492, 6085), (3651, 5820), (4365, 4868)]