19907140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2207}}^1$

素因数の和:2268

約数の個数: 48

約数和(自身を含む): 46738944

約数和(自身を除く): 26831804

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2207, 2255, 4414, 4510, 8828, 9020, 11035, 22070, 24277, 44140, 48554, 90487, 97108, 121385, 180974, 242770, 361948, 452435, 485540, 904870, 995357, 1809740, 1990714, 3981428, 4976785, 9953570, 19907140]

約数ペア:

[(1, 19907140), (2, 9953570), (4, 4976785), (5, 3981428), (10, 1990714), (11, 1809740), (20, 995357), (22, 904870), (41, 485540), (44, 452435), (55, 361948), (82, 242770), (110, 180974), (164, 121385), (205, 97108), (220, 90487), (410, 48554), (451, 44140), (820, 24277), (902, 22070), (1804, 11035), (2207, 9020), (2255, 8828), (4414, 4510)]