20952180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2707}}^1$

素因数の和:2765

約数の個数: 72

約数和(自身を含む): 65056992

約数和(自身を除く): 44104812

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, 2707, 3870, 5414, 7740, 8121, 10828, 13535, 16242, 24363, 27070, 32484, 40605, 48726, 54140, 81210, 97452, 116401, 121815, 162420, 232802, 243630, 349203, 465604, 487260, 582005, 698406, 1047609, 1164010, 1396812, 1746015, 2095218, 2328020, 3492030, 4190436, 5238045, 6984060, 10476090, 20952180]

約数ペア:

[(1, 20952180), (2, 10476090), (3, 6984060), (4, 5238045), (5, 4190436), (6, 3492030), (9, 2328020), (10, 2095218), (12, 1746015), (15, 1396812), (18, 1164010), (20, 1047609), (30, 698406), (36, 582005), (43, 487260), (45, 465604), (60, 349203), (86, 243630), (90, 232802), (129, 162420), (172, 121815), (180, 116401), (215, 97452), (258, 81210), (387, 54140), (430, 48726), (516, 40605), (645, 32484), (774, 27070), (860, 24363), (1290, 16242), (1548, 13535), (1935, 10828), (2580, 8121), (2707, 7740), (3870, 5414)]