21378994

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:299

約数の個数: 48

約数和(自身を含む): 40822488

約数和(自身を除く): 19443494

約数列:

[1, 2, 7, 13, 14, 26, 49, 91, 97, 98, 173, 182, 194, 346, 637, 679, 1211, 1261, 1274, 1358, 2249, 2422, 2522, 4498, 4753, 8477, 8827, 9506, 15743, 16781, 16954, 17654, 31486, 33562, 61789, 110201, 117467, 123578, 218153, 220402, 234934, 436306, 822269, 1527071, 1644538, 3054142, 10689497, 21378994]

約数ペア:

[(1, 21378994), (2, 10689497), (7, 3054142), (13, 1644538), (14, 1527071), (26, 822269), (49, 436306), (91, 234934), (97, 220402), (98, 218153), (173, 123578), (182, 117467), (194, 110201), (346, 61789), (637, 33562), (679, 31486), (1211, 17654), (1261, 16954), (1274, 16781), (1358, 15743), (2249, 9506), (2422, 8827), (2522, 8477), (4498, 4753)]