20972406

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{541}}^1$

素因数の和:637

約数の個数: 64

約数和(自身を含む): 52448256

約数和(自身を除く): 31475850

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 71, 78, 91, 142, 182, 213, 273, 426, 497, 541, 546, 923, 994, 1082, 1491, 1623, 1846, 2769, 2982, 3246, 3787, 5538, 6461, 7033, 7574, 11361, 12922, 14066, 19383, 21099, 22722, 38411, 38766, 42198, 49231, 76822, 98462, 115233, 147693, 230466, 268877, 295386, 499343, 537754, 806631, 998686, 1498029, 1613262, 2996058, 3495401, 6990802, 10486203, 20972406]

約数ペア:

[(1, 20972406), (2, 10486203), (3, 6990802), (6, 3495401), (7, 2996058), (13, 1613262), (14, 1498029), (21, 998686), (26, 806631), (39, 537754), (42, 499343), (71, 295386), (78, 268877), (91, 230466), (142, 147693), (182, 115233), (213, 98462), (273, 76822), (426, 49231), (497, 42198), (541, 38766), (546, 38411), (923, 22722), (994, 21099), (1082, 19383), (1491, 14066), (1623, 12922), (1846, 11361), (2769, 7574), (2982, 7033), (3246, 6461), (3787, 5538)]