18935140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{641}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 45730944

約数和(自身を除く): 26795804

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 641, 844, 1055, 1282, 1477, 2110, 2564, 2954, 3205, 4220, 4487, 5908, 6410, 7385, 8974, 12820, 14770, 17948, 22435, 29540, 44870, 89740, 135251, 270502, 541004, 676255, 946757, 1352510, 1893514, 2705020, 3787028, 4733785, 9467570, 18935140]

約数ペア:

[(1, 18935140), (2, 9467570), (4, 4733785), (5, 3787028), (7, 2705020), (10, 1893514), (14, 1352510), (20, 946757), (28, 676255), (35, 541004), (70, 270502), (140, 135251), (211, 89740), (422, 44870), (641, 29540), (844, 22435), (1055, 17948), (1282, 14770), (1477, 12820), (2110, 8974), (2564, 7385), (2954, 6410), (3205, 5908), (4220, 4487)]