40398680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{647}}^1$

素因数の和:888

約数の個数: 64

約数和(自身を含む): 104509440

約数和(自身を除く): 64110760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 223, 280, 446, 647, 892, 1115, 1294, 1561, 1784, 2230, 2588, 3122, 3235, 4460, 4529, 5176, 6244, 6470, 7805, 8920, 9058, 12488, 12940, 15610, 18116, 22645, 25880, 31220, 36232, 45290, 62440, 90580, 144281, 181160, 288562, 577124, 721405, 1009967, 1154248, 1442810, 2019934, 2885620, 4039868, 5049835, 5771240, 8079736, 10099670, 20199340, 40398680]

約数ペア:

[(1, 40398680), (2, 20199340), (4, 10099670), (5, 8079736), (7, 5771240), (8, 5049835), (10, 4039868), (14, 2885620), (20, 2019934), (28, 1442810), (35, 1154248), (40, 1009967), (56, 721405), (70, 577124), (140, 288562), (223, 181160), (280, 144281), (446, 90580), (647, 62440), (892, 45290), (1115, 36232), (1294, 31220), (1561, 25880), (1784, 22645), (2230, 18116), (2588, 15610), (3122, 12940), (3235, 12488), (4460, 9058), (4529, 8920), (5176, 7805), (6244, 6470)]