20381228

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 42491904

約数和(自身を除く): 22110676

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 103, 148, 191, 206, 259, 382, 412, 518, 721, 764, 1036, 1337, 1442, 2674, 2884, 3811, 5348, 7067, 7622, 14134, 15244, 19673, 26677, 28268, 39346, 49469, 53354, 78692, 98938, 106708, 137711, 197876, 275422, 550844, 727901, 1455802, 2911604, 5095307, 10190614, 20381228]

約数ペア:

[(1, 20381228), (2, 10190614), (4, 5095307), (7, 2911604), (14, 1455802), (28, 727901), (37, 550844), (74, 275422), (103, 197876), (148, 137711), (191, 106708), (206, 98938), (259, 78692), (382, 53354), (412, 49469), (518, 39346), (721, 28268), (764, 26677), (1036, 19673), (1337, 15244), (1442, 14134), (2674, 7622), (2884, 7067), (3811, 5348)]