20991810

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{99961}}^1$

素因数の和:99978

約数の個数: 32

約数和(自身を含む): 57578112

約数和(自身を除く): 36586302

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 99961, 199922, 299883, 499805, 599766, 699727, 999610, 1399454, 1499415, 2099181, 2998830, 3498635, 4198362, 6997270, 10495905, 20991810]

約数ペア:

[(1, 20991810), (2, 10495905), (3, 6997270), (5, 4198362), (6, 3498635), (7, 2998830), (10, 2099181), (14, 1499415), (15, 1399454), (21, 999610), (30, 699727), (35, 599766), (42, 499805), (70, 299883), (105, 199922), (210, 99961)]