20961780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1721}}^1$

素因数の和:1769

約数の個数: 96

約数和(自身を含む): 69431040

約数和(自身を除く): 48469260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 29, 30, 35, 42, 58, 60, 70, 84, 87, 105, 116, 140, 145, 174, 203, 210, 290, 348, 406, 420, 435, 580, 609, 812, 870, 1015, 1218, 1721, 1740, 2030, 2436, 3045, 3442, 4060, 5163, 6090, 6884, 8605, 10326, 12047, 12180, 17210, 20652, 24094, 25815, 34420, 36141, 48188, 49909, 51630, 60235, 72282, 99818, 103260, 120470, 144564, 149727, 180705, 199636, 240940, 249545, 299454, 349363, 361410, 499090, 598908, 698726, 722820, 748635, 998180, 1048089, 1397452, 1497270, 1746815, 2096178, 2994540, 3493630, 4192356, 5240445, 6987260, 10480890, 20961780]

約数ペア:

[(1, 20961780), (2, 10480890), (3, 6987260), (4, 5240445), (5, 4192356), (6, 3493630), (7, 2994540), (10, 2096178), (12, 1746815), (14, 1497270), (15, 1397452), (20, 1048089), (21, 998180), (28, 748635), (29, 722820), (30, 698726), (35, 598908), (42, 499090), (58, 361410), (60, 349363), (70, 299454), (84, 249545), (87, 240940), (105, 199636), (116, 180705), (140, 149727), (145, 144564), (174, 120470), (203, 103260), (210, 99818), (290, 72282), (348, 60235), (406, 51630), (420, 49909), (435, 48188), (580, 36141), (609, 34420), (812, 25815), (870, 24094), (1015, 20652), (1218, 17210), (1721, 12180), (1740, 12047), (2030, 10326), (2436, 8605), (3045, 6884), (3442, 6090), (4060, 5163)]