20978118

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{331}}^1\times {\mathrm{503}}^1$

素因数の和:849

約数の個数: 48

約数和(自身を含む): 52206336

約数和(自身を除く): 31228218

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 331, 503, 662, 993, 1006, 1509, 1986, 2317, 2979, 3018, 3521, 4527, 4634, 5958, 6951, 7042, 9054, 10563, 13902, 20853, 21126, 31689, 41706, 63378, 166493, 332986, 499479, 998958, 1165451, 1498437, 2330902, 2996874, 3496353, 6992706, 10489059, 20978118]

約数ペア:

[(1, 20978118), (2, 10489059), (3, 6992706), (6, 3496353), (7, 2996874), (9, 2330902), (14, 1498437), (18, 1165451), (21, 998958), (42, 499479), (63, 332986), (126, 166493), (331, 63378), (503, 41706), (662, 31689), (993, 21126), (1006, 20853), (1509, 13902), (1986, 10563), (2317, 9054), (2979, 7042), (3018, 6951), (3521, 5958), (4527, 4634)]