20866636

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{643}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 44719360

約数和(自身を除く): 23852724

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 61, 76, 122, 133, 244, 266, 427, 532, 643, 854, 1159, 1286, 1708, 2318, 2572, 4501, 4636, 8113, 9002, 12217, 16226, 18004, 24434, 32452, 39223, 48868, 78446, 85519, 156892, 171038, 274561, 342076, 549122, 745237, 1098244, 1490474, 2980948, 5216659, 10433318, 20866636]

約数ペア:

[(1, 20866636), (2, 10433318), (4, 5216659), (7, 2980948), (14, 1490474), (19, 1098244), (28, 745237), (38, 549122), (61, 342076), (76, 274561), (122, 171038), (133, 156892), (244, 85519), (266, 78446), (427, 48868), (532, 39223), (643, 32452), (854, 24434), (1159, 18004), (1286, 16226), (1708, 12217), (2318, 9002), (2572, 8113), (4501, 4636)]