21648780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2797}}^1$

素因数の和:2855

約数の個数: 72

約数和(自身を含む): 67219152

約数和(自身を除く): 45570372

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 2797, 3870, 5594, 7740, 8391, 11188, 13985, 16782, 25173, 27970, 33564, 41955, 50346, 55940, 83910, 100692, 120271, 125865, 167820, 240542, 251730, 360813, 481084, 503460, 601355, 721626, 1082439, 1202710, 1443252, 1804065, 2164878, 2405420, 3608130, 4329756, 5412195, 7216260, 10824390, 21648780]

約数ペア:

[(1, 21648780), (2, 10824390), (3, 7216260), (4, 5412195), (5, 4329756), (6, 3608130), (9, 2405420), (10, 2164878), (12, 1804065), (15, 1443252), (18, 1202710), (20, 1082439), (30, 721626), (36, 601355), (43, 503460), (45, 481084), (60, 360813), (86, 251730), (90, 240542), (129, 167820), (172, 125865), (180, 120271), (215, 100692), (258, 83910), (387, 55940), (430, 50346), (516, 41955), (645, 33564), (774, 27970), (860, 25173), (1290, 16782), (1548, 13985), (1935, 11188), (2580, 8391), (2797, 7740), (3870, 5594)]