21091700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1039}}^1$

素因数の和:1089

約数の個数: 72

約数和(自身を含む): 54163200

約数和(自身を除く): 33071500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 29, 35, 50, 58, 70, 100, 116, 140, 145, 175, 203, 290, 350, 406, 580, 700, 725, 812, 1015, 1039, 1450, 2030, 2078, 2900, 4060, 4156, 5075, 5195, 7273, 10150, 10390, 14546, 20300, 20780, 25975, 29092, 30131, 36365, 51950, 60262, 72730, 103900, 120524, 145460, 150655, 181825, 210917, 301310, 363650, 421834, 602620, 727300, 753275, 843668, 1054585, 1506550, 2109170, 3013100, 4218340, 5272925, 10545850, 21091700]

約数ペア:

[(1, 21091700), (2, 10545850), (4, 5272925), (5, 4218340), (7, 3013100), (10, 2109170), (14, 1506550), (20, 1054585), (25, 843668), (28, 753275), (29, 727300), (35, 602620), (50, 421834), (58, 363650), (70, 301310), (100, 210917), (116, 181825), (140, 150655), (145, 145460), (175, 120524), (203, 103900), (290, 72730), (350, 60262), (406, 51950), (580, 36365), (700, 30131), (725, 29092), (812, 25975), (1015, 20780), (1039, 20300), (1450, 14546), (2030, 10390), (2078, 10150), (2900, 7273), (4060, 5195), (4156, 5075)]