19989140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1283}}^1$

素因数の和:1352

約数の個数: 48

約数和(自身を含む): 45299520

約数和(自身を除く): 25310380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1283, 1558, 2566, 3116, 3895, 5132, 6415, 7790, 12830, 15580, 24377, 25660, 48754, 52603, 97508, 105206, 121885, 210412, 243770, 263015, 487540, 526030, 999457, 1052060, 1998914, 3997828, 4997285, 9994570, 19989140]

約数ペア:

[(1, 19989140), (2, 9994570), (4, 4997285), (5, 3997828), (10, 1998914), (19, 1052060), (20, 999457), (38, 526030), (41, 487540), (76, 263015), (82, 243770), (95, 210412), (164, 121885), (190, 105206), (205, 97508), (380, 52603), (410, 48754), (779, 25660), (820, 24377), (1283, 15580), (1558, 12830), (2566, 7790), (3116, 6415), (3895, 5132)]