20870824

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{359}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 43480800

約数和(自身を除く): 22609976

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 169, 172, 338, 344, 359, 559, 676, 718, 1118, 1352, 1436, 2236, 2872, 4472, 4667, 7267, 9334, 14534, 15437, 18668, 29068, 30874, 37336, 58136, 60671, 61748, 121342, 123496, 200681, 242684, 401362, 485368, 802724, 1605448, 2608853, 5217706, 10435412, 20870824]

約数ペア:

[(1, 20870824), (2, 10435412), (4, 5217706), (8, 2608853), (13, 1605448), (26, 802724), (43, 485368), (52, 401362), (86, 242684), (104, 200681), (169, 123496), (172, 121342), (338, 61748), (344, 60671), (359, 58136), (559, 37336), (676, 30874), (718, 29068), (1118, 18668), (1352, 15437), (1436, 14534), (2236, 9334), (2872, 7267), (4472, 4667)]