20790280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1811}}^1$

素因数の和:1870

約数の個数: 64

約数和(自身を含む): 54794880

約数和(自身を除く): 34004600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 1811, 2296, 2870, 3622, 5740, 7244, 9055, 11480, 12677, 14488, 18110, 25354, 36220, 50708, 63385, 72440, 74251, 101416, 126770, 148502, 253540, 297004, 371255, 507080, 519757, 594008, 742510, 1039514, 1485020, 2079028, 2598785, 2970040, 4158056, 5197570, 10395140, 20790280]

約数ペア:

[(1, 20790280), (2, 10395140), (4, 5197570), (5, 4158056), (7, 2970040), (8, 2598785), (10, 2079028), (14, 1485020), (20, 1039514), (28, 742510), (35, 594008), (40, 519757), (41, 507080), (56, 371255), (70, 297004), (82, 253540), (140, 148502), (164, 126770), (205, 101416), (280, 74251), (287, 72440), (328, 63385), (410, 50708), (574, 36220), (820, 25354), (1148, 18110), (1435, 14488), (1640, 12677), (1811, 11480), (2296, 9055), (2870, 7244), (3622, 5740)]