21308220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2753}}^1$

素因数の和:2811

約数の個数: 72

約数和(自身を含む): 66162096

約数和(自身を除く): 44853876

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, 2753, 3870, 5506, 7740, 8259, 11012, 13765, 16518, 24777, 27530, 33036, 41295, 49554, 55060, 82590, 99108, 118379, 123885, 165180, 236758, 247770, 355137, 473516, 495540, 591895, 710274, 1065411, 1183790, 1420548, 1775685, 2130822, 2367580, 3551370, 4261644, 5327055, 7102740, 10654110, 21308220]

約数ペア:

[(1, 21308220), (2, 10654110), (3, 7102740), (4, 5327055), (5, 4261644), (6, 3551370), (9, 2367580), (10, 2130822), (12, 1775685), (15, 1420548), (18, 1183790), (20, 1065411), (30, 710274), (36, 591895), (43, 495540), (45, 473516), (60, 355137), (86, 247770), (90, 236758), (129, 165180), (172, 123885), (180, 118379), (215, 99108), (258, 82590), (387, 55060), (430, 49554), (516, 41295), (645, 33036), (774, 27530), (860, 24777), (1290, 16518), (1548, 13765), (1935, 11012), (2580, 8259), (2753, 7740), (3870, 5506)]