20213145

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1721}}^1$

素因数の和:1767

約数の個数: 40

約数和(自身を含む): 37505160

約数和(自身を除く): 17292015

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1721, 2349, 3915, 5163, 8605, 11745, 15489, 25815, 46467, 49909, 77445, 139401, 149727, 232335, 249545, 449181, 697005, 748635, 1347543, 2245905, 4042629, 6737715, 20213145]

約数ペア:

[(1, 20213145), (3, 6737715), (5, 4042629), (9, 2245905), (15, 1347543), (27, 748635), (29, 697005), (45, 449181), (81, 249545), (87, 232335), (135, 149727), (145, 139401), (261, 77445), (405, 49909), (435, 46467), (783, 25815), (1305, 15489), (1721, 11745), (2349, 8605), (3915, 5163)]