20910820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3643}}^1$

素因数の和:3700

約数の個数: 48

約数和(自身を含む): 51424128

約数和(自身を除く): 30513308

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3643, 5740, 7286, 14572, 18215, 25501, 36430, 51002, 72860, 102004, 127505, 149363, 255010, 298726, 510020, 597452, 746815, 1045541, 1493630, 2091082, 2987260, 4182164, 5227705, 10455410, 20910820]

約数ペア:

[(1, 20910820), (2, 10455410), (4, 5227705), (5, 4182164), (7, 2987260), (10, 2091082), (14, 1493630), (20, 1045541), (28, 746815), (35, 597452), (41, 510020), (70, 298726), (82, 255010), (140, 149363), (164, 127505), (205, 102004), (287, 72860), (410, 51002), (574, 36430), (820, 25501), (1148, 18215), (1435, 14572), (2870, 7286), (3643, 5740)]