20509380

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{3929}}^1$

素因数の和:3973

約数の個数: 72

約数和(自身を含む): 64373400

約数和(自身を除く): 43864020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 3929, 5220, 7858, 11787, 15716, 19645, 23574, 35361, 39290, 47148, 58935, 70722, 78580, 113941, 117870, 141444, 176805, 227882, 235740, 341823, 353610, 455764, 569705, 683646, 707220, 1025469, 1139410, 1367292, 1709115, 2050938, 2278820, 3418230, 4101876, 5127345, 6836460, 10254690, 20509380]

約数ペア:

[(1, 20509380), (2, 10254690), (3, 6836460), (4, 5127345), (5, 4101876), (6, 3418230), (9, 2278820), (10, 2050938), (12, 1709115), (15, 1367292), (18, 1139410), (20, 1025469), (29, 707220), (30, 683646), (36, 569705), (45, 455764), (58, 353610), (60, 341823), (87, 235740), (90, 227882), (116, 176805), (145, 141444), (174, 117870), (180, 113941), (261, 78580), (290, 70722), (348, 58935), (435, 47148), (522, 39290), (580, 35361), (870, 23574), (1044, 19645), (1305, 15716), (1740, 11787), (2610, 7858), (3929, 5220)]