20978152

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{4691}}^1$

素因数の和:4753

約数の個数: 32

約数和(自身を含む): 43354080

約数和(自身を除く): 22375928

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 172, 344, 559, 1118, 2236, 4472, 4691, 9382, 18764, 37528, 60983, 121966, 201713, 243932, 403426, 487864, 806852, 1613704, 2622269, 5244538, 10489076, 20978152]

約数ペア:

[(1, 20978152), (2, 10489076), (4, 5244538), (8, 2622269), (13, 1613704), (26, 806852), (43, 487864), (52, 403426), (86, 243932), (104, 201713), (172, 121966), (344, 60983), (559, 37528), (1118, 18764), (2236, 9382), (4472, 4691)]