128745981

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1321}}^1$

素因数の和:1371

約数の個数: 72

約数和(自身を含む): 246859704

約数和(自身を除く): 118113723

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 49, 51, 63, 91, 117, 119, 147, 153, 221, 273, 357, 441, 637, 663, 819, 833, 1071, 1321, 1547, 1911, 1989, 2499, 3963, 4641, 5733, 7497, 9247, 10829, 11889, 13923, 17173, 22457, 27741, 32487, 51519, 64729, 67371, 83223, 97461, 120211, 154557, 157199, 194187, 202113, 291941, 360633, 471597, 582561, 841477, 875823, 1081899, 1100393, 1414791, 2043587, 2524431, 2627469, 3301179, 6130761, 7573293, 9903537, 14305109, 18392283, 42915327, 128745981]

約数ペア:

[(1, 128745981), (3, 42915327), (7, 18392283), (9, 14305109), (13, 9903537), (17, 7573293), (21, 6130761), (39, 3301179), (49, 2627469), (51, 2524431), (63, 2043587), (91, 1414791), (117, 1100393), (119, 1081899), (147, 875823), (153, 841477), (221, 582561), (273, 471597), (357, 360633), (441, 291941), (637, 202113), (663, 194187), (819, 157199), (833, 154557), (1071, 120211), (1321, 97461), (1547, 83223), (1911, 67371), (1989, 64729), (2499, 51519), (3963, 32487), (4641, 27741), (5733, 22457), (7497, 17173), (9247, 13923), (10829, 11889)]