21456656

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2399}}^1$

素因数の和:2463

約数の個数: 40

約数和(自身を含む): 45830400

約数和(自身を除く): 24373744

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 344, 559, 688, 1118, 2236, 2399, 4472, 4798, 8944, 9596, 19192, 31187, 38384, 62374, 103157, 124748, 206314, 249496, 412628, 498992, 825256, 1341041, 1650512, 2682082, 5364164, 10728328, 21456656]

約数ペア:

[(1, 21456656), (2, 10728328), (4, 5364164), (8, 2682082), (13, 1650512), (16, 1341041), (26, 825256), (43, 498992), (52, 412628), (86, 249496), (104, 206314), (172, 124748), (208, 103157), (344, 62374), (559, 38384), (688, 31187), (1118, 19192), (2236, 9596), (2399, 8944), (4472, 4798)]