20640536

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^2\times {\mathrm{1021}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 46725840

約数和(自身を除く): 26085304

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 361, 532, 722, 1021, 1064, 1444, 2042, 2527, 2888, 4084, 5054, 7147, 8168, 10108, 14294, 19399, 20216, 28588, 38798, 57176, 77596, 135793, 155192, 271586, 368581, 543172, 737162, 1086344, 1474324, 2580067, 2948648, 5160134, 10320268, 20640536]

約数ペア:

[(1, 20640536), (2, 10320268), (4, 5160134), (7, 2948648), (8, 2580067), (14, 1474324), (19, 1086344), (28, 737162), (38, 543172), (56, 368581), (76, 271586), (133, 155192), (152, 135793), (266, 77596), (361, 57176), (532, 38798), (722, 28588), (1021, 20216), (1064, 19399), (1444, 14294), (2042, 10108), (2527, 8168), (2888, 7147), (4084, 5054)]