21511154

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:183

約数の個数: 64

約数和(自身を含む): 42301440

約数和(自身を除く): 20790286

約数列:

[1, 2, 7, 14, 17, 19, 34, 38, 67, 71, 119, 133, 134, 142, 238, 266, 323, 469, 497, 646, 938, 994, 1139, 1207, 1273, 1349, 2261, 2278, 2414, 2546, 2698, 4522, 4757, 7973, 8449, 8911, 9443, 9514, 15946, 16898, 17822, 18886, 21641, 22933, 33299, 43282, 45866, 66598, 80869, 90383, 151487, 160531, 161738, 180766, 302974, 321062, 566083, 632681, 1132166, 1265362, 1536511, 3073022, 10755577, 21511154]

約数ペア:

[(1, 21511154), (2, 10755577), (7, 3073022), (14, 1536511), (17, 1265362), (19, 1132166), (34, 632681), (38, 566083), (67, 321062), (71, 302974), (119, 180766), (133, 161738), (134, 160531), (142, 151487), (238, 90383), (266, 80869), (323, 66598), (469, 45866), (497, 43282), (646, 33299), (938, 22933), (994, 21641), (1139, 18886), (1207, 17822), (1273, 16898), (1349, 15946), (2261, 9514), (2278, 9443), (2414, 8911), (2546, 8449), (2698, 7973), (4522, 4757)]