20490015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{883}}^1$

素因数の和:928

約数の個数: 64

約数和(自身を含む): 42771456

約数和(自身を除く): 22281441

約数列:

[1, 3, 5, 7, 13, 15, 17, 21, 35, 39, 51, 65, 85, 91, 105, 119, 195, 221, 255, 273, 357, 455, 595, 663, 883, 1105, 1365, 1547, 1785, 2649, 3315, 4415, 4641, 6181, 7735, 11479, 13245, 15011, 18543, 23205, 30905, 34437, 45033, 57395, 75055, 80353, 92715, 105077, 172185, 195143, 225165, 241059, 315231, 401765, 525385, 585429, 975715, 1205295, 1366001, 1576155, 2927145, 4098003, 6830005, 20490015]

約数ペア:

[(1, 20490015), (3, 6830005), (5, 4098003), (7, 2927145), (13, 1576155), (15, 1366001), (17, 1205295), (21, 975715), (35, 585429), (39, 525385), (51, 401765), (65, 315231), (85, 241059), (91, 225165), (105, 195143), (119, 172185), (195, 105077), (221, 92715), (255, 80353), (273, 75055), (357, 57395), (455, 45033), (595, 34437), (663, 30905), (883, 23205), (1105, 18543), (1365, 15011), (1547, 13245), (1785, 11479), (2649, 7735), (3315, 6181), (4415, 4641)]